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This contract contains unverified libraries: ReserveLogic, ValidationLogic
This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.
Contract Name:
LendingPool
Compiler Version
v0.7.6+commit.7338295f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import {SafeMath} from "../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {IERC20} from "../../dependencies/openzeppelin/contracts/IERC20.sol";
import {SafeERC20} from "../../dependencies/openzeppelin/contracts/SafeERC20.sol";
import {Address} from "../../dependencies/openzeppelin/contracts/Address.sol";
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {IAToken} from "../../interfaces/IAToken.sol";
import {IVariableDebtToken} from "../../interfaces/IVariableDebtToken.sol";
import {IFlashLoanReceiver} from "../../flashloan/interfaces/IFlashLoanReceiver.sol";
import {IPriceOracleGetter} from "../../interfaces/IPriceOracleGetter.sol";
import {IStableDebtToken} from "../../interfaces/IStableDebtToken.sol";
import {ILendingPool} from "../../interfaces/ILendingPool.sol";
import {VersionedInitializable} from "../libraries/aave-upgradeability/VersionedInitializable.sol";
import {Helpers} from "../libraries/helpers/Helpers.sol";
import {Errors} from "../libraries/helpers/Errors.sol";
import {WadRayMath} from "../libraries/math/WadRayMath.sol";
import {PercentageMath} from "../libraries/math/PercentageMath.sol";
import {ReserveLogic} from "../libraries/logic/ReserveLogic.sol";
import {GenericLogic} from "../libraries/logic/GenericLogic.sol";
import {ValidationLogic} from "../libraries/logic/ValidationLogic.sol";
import {ReserveConfiguration} from "../libraries/configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../libraries/configuration/UserConfiguration.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";
import {LendingPoolStorage} from "./LendingPoolStorage.sol";
/**
* @title LendingPool contract
* @dev Main point of interaction with an Aave protocol's market
* - Users can:
* # Deposit
* # Withdraw
* # Borrow
* # Repay
* # Swap their loans between variable and stable rate
* # Enable/disable their deposits as collateral rebalance stable rate borrow positions
* # Liquidate positions
* # Execute Flash Loans
* - To be covered by a proxy contract, owned by the LendingPoolAddressesProvider of the specific market
* - All admin functions are callable by the LendingPoolConfigurator contract defined also in the
* LendingPoolAddressesProvider
* @author Aave
**/
contract LendingPool is
VersionedInitializable,
ILendingPool,
LendingPoolStorage
{
using SafeMath for uint256;
using WadRayMath for uint256;
using PercentageMath for uint256;
using SafeERC20 for IERC20;
using ReserveLogic for DataTypes.ReserveData;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
using UserConfiguration for DataTypes.UserConfigurationMap;
uint256 public constant LENDINGPOOL_REVISION = 0x2;
modifier whenNotPaused() {
_whenNotPaused();
_;
}
modifier onlyLendingPoolConfigurator() {
_onlyLendingPoolConfigurator();
_;
}
function _whenNotPaused() internal view {
require(!_paused, Errors.LP_IS_PAUSED);
}
function _onlyLendingPoolConfigurator() internal view {
require(
_addressesProvider.getLendingPoolConfigurator() == msg.sender,
Errors.LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR
);
}
function getRevision() internal pure override returns (uint256) {
return LENDINGPOOL_REVISION;
}
/**
* @dev Function is invoked by the proxy contract when the LendingPool contract is added to the
* LendingPoolAddressesProvider of the market.
* - Caching the address of the LendingPoolAddressesProvider in order to reduce gas consumption
* on subsequent operations
* @param provider The address of the LendingPoolAddressesProvider
**/
function initialize(ILendingPoolAddressesProvider provider)
public
initializer
{
_addressesProvider = provider;
_maxStableRateBorrowSizePercent = 2500;
_flashLoanPremiumTotal = 9;
_maxNumberOfReserves = 128;
}
/**
* @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
* - E.g. User deposits 100 USDC and gets in return 100 aUSDC
* @param asset The address of the underlying asset to deposit
* @param amount The amount to be deposited
* @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
* wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
* is a different wallet
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external override whenNotPaused {
DataTypes.ReserveData storage reserve = _reserves[asset];
ValidationLogic.validateDeposit(reserve, amount);
address aToken = reserve.aTokenAddress;
reserve.updateState();
reserve.updateInterestRates(asset, aToken, amount, 0);
IERC20(asset).safeTransferFrom(msg.sender, aToken, amount);
bool isFirstDeposit = IAToken(aToken).mint(
onBehalfOf,
amount,
reserve.liquidityIndex
);
if (isFirstDeposit) {
_usersConfig[onBehalfOf].setUsingAsCollateral(reserve.id, true);
emit ReserveUsedAsCollateralEnabled(asset, onBehalfOf);
}
emit Deposit(asset, msg.sender, onBehalfOf, amount, referralCode);
}
/**
* @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
* E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
* @param asset The address of the underlying asset to withdraw
* @param amount The underlying amount to be withdrawn
* - Send the value type(uint256).max in order to withdraw the whole aToken balance
* @param to Address that will receive the underlying, same as msg.sender if the user
* wants to receive it on his own wallet, or a different address if the beneficiary is a
* different wallet
* @return The final amount withdrawn
**/
function withdraw(
address asset,
uint256 amount,
address to
) external override whenNotPaused returns (uint256) {
DataTypes.ReserveData storage reserve = _reserves[asset];
address aToken = reserve.aTokenAddress;
uint256 userBalance = IAToken(aToken).balanceOf(msg.sender);
uint256 amountToWithdraw = amount;
if (amount == type(uint256).max) {
amountToWithdraw = userBalance;
}
ValidationLogic.validateWithdraw(
asset,
amountToWithdraw,
userBalance,
_reserves,
_usersConfig[msg.sender],
_reservesList,
_reservesCount,
_addressesProvider.getPriceOracle()
);
reserve.updateState();
reserve.updateInterestRates(asset, aToken, 0, amountToWithdraw);
if (amountToWithdraw == userBalance) {
_usersConfig[msg.sender].setUsingAsCollateral(reserve.id, false);
emit ReserveUsedAsCollateralDisabled(asset, msg.sender);
}
IAToken(aToken).burn(
msg.sender,
to,
amountToWithdraw,
reserve.liquidityIndex
);
emit Withdraw(asset, msg.sender, to, amountToWithdraw);
return amountToWithdraw;
}
/**
* @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
* already deposited enough collateral, or he was given enough allowance by a credit delegator on the
* corresponding debt token (StableDebtToken or VariableDebtToken)
* - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
* and 100 stable/variable debt tokens, depending on the `interestRateMode`
* @param asset The address of the underlying asset to borrow
* @param amount The amount to be borrowed
* @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
* @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
* calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
* if he has been given credit delegation allowance
**/
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external override whenNotPaused {
DataTypes.ReserveData storage reserve = _reserves[asset];
_executeBorrow(
ExecuteBorrowParams(
asset,
msg.sender,
onBehalfOf,
amount,
interestRateMode,
reserve.aTokenAddress,
referralCode,
true
)
);
}
/**
* @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
* - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
* @param asset The address of the borrowed underlying asset previously borrowed
* @param amount The amount to repay
* - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
* @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
* @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
* user calling the function if he wants to reduce/remove his own debt, or the address of any other
* other borrower whose debt should be removed
* @return The final amount repaid
**/
function repay(
address asset,
uint256 amount,
uint256 rateMode,
address onBehalfOf
) external override whenNotPaused returns (uint256) {
DataTypes.ReserveData storage reserve = _reserves[asset];
(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(
onBehalfOf,
reserve
);
DataTypes.InterestRateMode interestRateMode = DataTypes
.InterestRateMode(rateMode);
ValidationLogic.validateRepay(
reserve,
amount,
interestRateMode,
onBehalfOf,
stableDebt,
variableDebt
);
uint256 paybackAmount = interestRateMode ==
DataTypes.InterestRateMode.STABLE
? stableDebt
: variableDebt;
if (amount < paybackAmount) {
paybackAmount = amount;
}
reserve.updateState();
if (interestRateMode == DataTypes.InterestRateMode.STABLE) {
IStableDebtToken(reserve.stableDebtTokenAddress).burn(
onBehalfOf,
paybackAmount
);
} else {
IVariableDebtToken(reserve.variableDebtTokenAddress).burn(
onBehalfOf,
paybackAmount,
reserve.variableBorrowIndex
);
}
address aToken = reserve.aTokenAddress;
reserve.updateInterestRates(asset, aToken, paybackAmount, 0);
if (stableDebt.add(variableDebt).sub(paybackAmount) == 0) {
_usersConfig[onBehalfOf].setBorrowing(reserve.id, false);
}
IERC20(asset).safeTransferFrom(msg.sender, aToken, paybackAmount);
IAToken(aToken).handleRepayment(msg.sender, paybackAmount);
emit Repay(asset, onBehalfOf, msg.sender, paybackAmount);
return paybackAmount;
}
/**
* @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
* @param asset The address of the underlying asset borrowed
* @param rateMode The rate mode that the user wants to swap to
**/
function swapBorrowRateMode(address asset, uint256 rateMode)
external
override
whenNotPaused
{
DataTypes.ReserveData storage reserve = _reserves[asset];
(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(
msg.sender,
reserve
);
DataTypes.InterestRateMode interestRateMode = DataTypes
.InterestRateMode(rateMode);
ValidationLogic.validateSwapRateMode(
reserve,
_usersConfig[msg.sender],
stableDebt,
variableDebt,
interestRateMode
);
reserve.updateState();
if (interestRateMode == DataTypes.InterestRateMode.STABLE) {
IStableDebtToken(reserve.stableDebtTokenAddress).burn(
msg.sender,
stableDebt
);
IVariableDebtToken(reserve.variableDebtTokenAddress).mint(
msg.sender,
msg.sender,
stableDebt,
reserve.variableBorrowIndex
);
} else {
IVariableDebtToken(reserve.variableDebtTokenAddress).burn(
msg.sender,
variableDebt,
reserve.variableBorrowIndex
);
IStableDebtToken(reserve.stableDebtTokenAddress).mint(
msg.sender,
msg.sender,
variableDebt,
reserve.currentStableBorrowRate
);
}
reserve.updateInterestRates(asset, reserve.aTokenAddress, 0, 0);
emit Swap(asset, msg.sender, rateMode);
}
/**
* @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
* - Users can be rebalanced if the following conditions are satisfied:
* 1. Usage ratio is above 95%
* 2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been
* borrowed at a stable rate and depositors are not earning enough
* @param asset The address of the underlying asset borrowed
* @param user The address of the user to be rebalanced
**/
function rebalanceStableBorrowRate(address asset, address user)
external
override
whenNotPaused
{
DataTypes.ReserveData storage reserve = _reserves[asset];
IERC20 stableDebtToken = IERC20(reserve.stableDebtTokenAddress);
IERC20 variableDebtToken = IERC20(reserve.variableDebtTokenAddress);
address aTokenAddress = reserve.aTokenAddress;
uint256 stableDebt = IERC20(stableDebtToken).balanceOf(user);
ValidationLogic.validateRebalanceStableBorrowRate(
reserve,
asset,
stableDebtToken,
variableDebtToken,
aTokenAddress
);
reserve.updateState();
IStableDebtToken(address(stableDebtToken)).burn(user, stableDebt);
IStableDebtToken(address(stableDebtToken)).mint(
user,
user,
stableDebt,
reserve.currentStableBorrowRate
);
reserve.updateInterestRates(asset, aTokenAddress, 0, 0);
emit RebalanceStableBorrowRate(asset, user);
}
/**
* @dev Allows depositors to enable/disable a specific deposited asset as collateral
* @param asset The address of the underlying asset deposited
* @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
**/
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral)
external
override
whenNotPaused
{
DataTypes.ReserveData storage reserve = _reserves[asset];
ValidationLogic.validateSetUseReserveAsCollateral(
reserve,
asset,
useAsCollateral,
_reserves,
_usersConfig[msg.sender],
_reservesList,
_reservesCount,
_addressesProvider.getPriceOracle()
);
_usersConfig[msg.sender].setUsingAsCollateral(
reserve.id,
useAsCollateral
);
if (useAsCollateral) {
emit ReserveUsedAsCollateralEnabled(asset, msg.sender);
} else {
emit ReserveUsedAsCollateralDisabled(asset, msg.sender);
}
}
/**
* @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
* - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
* a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
* @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
* @param user The address of the borrower getting liquidated
* @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
* @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
* to receive the underlying collateral asset directly
**/
function liquidationCall(
address collateralAsset,
address debtAsset,
address user,
uint256 debtToCover,
bool receiveAToken
) external override whenNotPaused {
address collateralManager = _addressesProvider
.getLendingPoolCollateralManager();
address liquidationFeeTo = _addressesProvider.getLiquidationFeeTo();
if (liquidationFeeTo == address(0)) {
liquidationFeeTo = msg.sender;
}
//solium-disable-next-line
(bool success, bytes memory result) = collateralManager.delegatecall(
abi.encodeWithSignature(
"liquidationCall(address,address,address,uint256,bool,address)",
collateralAsset,
debtAsset,
user,
debtToCover,
receiveAToken,
liquidationFeeTo
)
);
require(success, Errors.LP_LIQUIDATION_CALL_FAILED);
(uint256 returnCode, string memory returnMessage) = abi.decode(
result,
(uint256, string)
);
require(returnCode == 0, string(abi.encodePacked(returnMessage)));
}
struct FlashLoanLocalVars {
IFlashLoanReceiver receiver;
address oracle;
uint256 i;
address currentAsset;
address currentATokenAddress;
uint256 currentAmount;
uint256 currentPremium;
uint256 currentAmountPlusPremium;
address debtToken;
}
/**
* @dev Allows smartcontracts to access the liquidity of the pool within one transaction,
* as long as the amount taken plus a fee is returned.
* IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration.
* For further details please visit https://developers.aave.com
* @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
* @param assets The addresses of the assets being flash-borrowed
* @param amounts The amounts amounts being flash-borrowed
* @param modes Types of the debt to open if the flash loan is not returned:
* 0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
* 1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* 2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* @param onBehalfOf The address that will receive the debt in the case of using on `modes` 1 or 2
* @param params Variadic packed params to pass to the receiver as extra information
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function flashLoan(
address receiverAddress,
address[] calldata assets,
uint256[] calldata amounts,
uint256[] calldata modes,
address onBehalfOf,
bytes calldata params,
uint16 referralCode
) external override whenNotPaused {
FlashLoanLocalVars memory vars;
ValidationLogic.validateFlashloan(assets, amounts);
address[] memory aTokenAddresses = new address[](assets.length);
uint256[] memory premiums = new uint256[](assets.length);
vars.receiver = IFlashLoanReceiver(receiverAddress);
for (vars.i = 0; vars.i < assets.length; vars.i++) {
aTokenAddresses[vars.i] = _reserves[assets[vars.i]].aTokenAddress;
premiums[vars.i] = amounts[vars.i].mul(_flashLoanPremiumTotal).div(
10000
);
IAToken(aTokenAddresses[vars.i]).transferUnderlyingTo(
receiverAddress,
amounts[vars.i]
);
}
require(
vars.receiver.executeOperation(
assets,
amounts,
premiums,
msg.sender,
params
),
Errors.LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN
);
for (vars.i = 0; vars.i < assets.length; vars.i++) {
vars.currentAsset = assets[vars.i];
vars.currentAmount = amounts[vars.i];
vars.currentPremium = premiums[vars.i];
vars.currentATokenAddress = aTokenAddresses[vars.i];
vars.currentAmountPlusPremium = vars.currentAmount.add(
vars.currentPremium
);
if (
DataTypes.InterestRateMode(modes[vars.i]) ==
DataTypes.InterestRateMode.NONE
) {
_reserves[vars.currentAsset].updateState();
_reserves[vars.currentAsset].cumulateToLiquidityIndex(
IERC20(vars.currentATokenAddress).totalSupply(),
vars.currentPremium
);
_reserves[vars.currentAsset].updateInterestRates(
vars.currentAsset,
vars.currentATokenAddress,
vars.currentAmountPlusPremium,
0
);
IERC20(vars.currentAsset).safeTransferFrom(
receiverAddress,
vars.currentATokenAddress,
vars.currentAmountPlusPremium
);
} else {
// If the user chose to not return the funds, the system checks if there is enough collateral and
// eventually opens a debt position
_executeBorrow(
ExecuteBorrowParams(
vars.currentAsset,
msg.sender,
onBehalfOf,
vars.currentAmount,
modes[vars.i],
vars.currentATokenAddress,
referralCode,
false
)
);
}
emit FlashLoan(
receiverAddress,
msg.sender,
vars.currentAsset,
vars.currentAmount,
vars.currentPremium,
referralCode
);
}
}
/**
* @dev Returns the state and configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The state of the reserve
**/
function getReserveData(address asset)
external
view
override
returns (DataTypes.ReserveData memory)
{
return _reserves[asset];
}
/**
* @dev Returns the user account data across all the reserves
* @param user The address of the user
* @return totalCollateralETH the total collateral in ETH of the user
* @return totalDebtETH the total debt in ETH of the user
* @return availableBorrowsETH the borrowing power left of the user
* @return currentLiquidationThreshold the liquidation threshold of the user
* @return ltv the loan to value of the user
* @return healthFactor the current health factor of the user
**/
function getUserAccountData(address user)
external
view
override
returns (
uint256 totalCollateralETH,
uint256 totalDebtETH,
uint256 availableBorrowsETH,
uint256 currentLiquidationThreshold,
uint256 ltv,
uint256 healthFactor
)
{
(
totalCollateralETH,
totalDebtETH,
ltv,
currentLiquidationThreshold,
healthFactor
) = GenericLogic.calculateUserAccountData(
user,
_reserves,
_usersConfig[user],
_reservesList,
_reservesCount,
_addressesProvider.getPriceOracle()
);
availableBorrowsETH = GenericLogic.calculateAvailableBorrowsETH(
totalCollateralETH,
totalDebtETH,
ltv
);
}
/**
* @dev Returns the configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The configuration of the reserve
**/
function getConfiguration(address asset)
external
view
override
returns (DataTypes.ReserveConfigurationMap memory)
{
return _reserves[asset].configuration;
}
/**
* @dev Returns the configuration of the user across all the reserves
* @param user The user address
* @return The configuration of the user
**/
function getUserConfiguration(address user)
external
view
override
returns (DataTypes.UserConfigurationMap memory)
{
return _usersConfig[user];
}
/**
* @dev Returns the normalized income per unit of asset
* @param asset The address of the underlying asset of the reserve
* @return The reserve's normalized income
*/
function getReserveNormalizedIncome(address asset)
external
view
virtual
override
returns (uint256)
{
return _reserves[asset].getNormalizedIncome();
}
/**
* @dev Returns the normalized variable debt per unit of asset
* @param asset The address of the underlying asset of the reserve
* @return The reserve normalized variable debt
*/
function getReserveNormalizedVariableDebt(address asset)
external
view
override
returns (uint256)
{
return _reserves[asset].getNormalizedDebt();
}
/**
* @dev Returns if the LendingPool is paused
*/
function paused() external view override returns (bool) {
return _paused;
}
/**
* @dev Returns the list of the initialized reserves
**/
function getReservesList()
external
view
override
returns (address[] memory)
{
address[] memory _activeReserves = new address[](_reservesCount);
for (uint256 i = 0; i < _reservesCount; i++) {
_activeReserves[i] = _reservesList[i];
}
return _activeReserves;
}
/**
* @dev Returns the cached LendingPoolAddressesProvider connected to this contract
**/
function getAddressesProvider()
external
view
override
returns (ILendingPoolAddressesProvider)
{
return _addressesProvider;
}
/**
* @dev Returns the percentage of available liquidity that can be borrowed at once at stable rate
*/
function MAX_STABLE_RATE_BORROW_SIZE_PERCENT()
public
view
returns (uint256)
{
return _maxStableRateBorrowSizePercent;
}
/**
* @dev Returns the fee on flash loans
*/
function FLASHLOAN_PREMIUM_TOTAL() public view returns (uint256) {
return _flashLoanPremiumTotal;
}
/**
* @dev Returns the maximum number of reserves supported to be listed in this LendingPool
*/
function MAX_NUMBER_RESERVES() public view returns (uint256) {
return _maxNumberOfReserves;
}
/**
* @dev Validates and finalizes an aToken transfer
* - Only callable by the overlying aToken of the `asset`
* @param asset The address of the underlying asset of the aToken
* @param from The user from which the aTokens are transferred
* @param to The user receiving the aTokens
* @param amount The amount being transferred/withdrawn
* @param balanceFromBefore The aToken balance of the `from` user before the transfer
* @param balanceToBefore The aToken balance of the `to` user before the transfer
*/
function finalizeTransfer(
address asset,
address from,
address to,
uint256 amount,
uint256 balanceFromBefore,
uint256 balanceToBefore
) external override whenNotPaused {
require(
msg.sender == _reserves[asset].aTokenAddress,
Errors.LP_CALLER_MUST_BE_AN_ATOKEN
);
ValidationLogic.validateTransfer(
from,
_reserves,
_usersConfig[from],
_reservesList,
_reservesCount,
_addressesProvider.getPriceOracle()
);
uint256 reserveId = _reserves[asset].id;
if (from != to) {
if (balanceFromBefore.sub(amount) == 0) {
DataTypes.UserConfigurationMap
storage fromConfig = _usersConfig[from];
fromConfig.setUsingAsCollateral(reserveId, false);
emit ReserveUsedAsCollateralDisabled(asset, from);
}
if (balanceToBefore == 0 && amount != 0) {
DataTypes.UserConfigurationMap storage toConfig = _usersConfig[
to
];
toConfig.setUsingAsCollateral(reserveId, true);
emit ReserveUsedAsCollateralEnabled(asset, to);
}
}
}
/**
* @dev Initializes a reserve, activating it, assigning an aToken and debt tokens and an
* interest rate strategy
* - Only callable by the LendingPoolConfigurator contract
* @param asset The address of the underlying asset of the reserve
* @param aTokenAddress The address of the aToken that will be assigned to the reserve
* @param stableDebtAddress The address of the StableDebtToken that will be assigned to the reserve
* @param aTokenAddress The address of the VariableDebtToken that will be assigned to the reserve
* @param interestRateStrategyAddress The address of the interest rate strategy contract
**/
function initReserve(
address asset,
address aTokenAddress,
address stableDebtAddress,
address variableDebtAddress,
address interestRateStrategyAddress
) external override onlyLendingPoolConfigurator {
require(Address.isContract(asset), Errors.LP_NOT_CONTRACT);
_reserves[asset].init(
aTokenAddress,
stableDebtAddress,
variableDebtAddress,
interestRateStrategyAddress
);
_addReserveToList(asset);
}
/**
* @dev Updates the address of the interest rate strategy contract
* - Only callable by the LendingPoolConfigurator contract
* @param asset The address of the underlying asset of the reserve
* @param rateStrategyAddress The address of the interest rate strategy contract
**/
function setReserveInterestRateStrategyAddress(
address asset,
address rateStrategyAddress
) external override onlyLendingPoolConfigurator {
_reserves[asset].interestRateStrategyAddress = rateStrategyAddress;
}
/**
* @dev Sets the configuration bitmap of the reserve as a whole
* - Only callable by the LendingPoolConfigurator contract
* @param asset The address of the underlying asset of the reserve
* @param configuration The new configuration bitmap
**/
function setConfiguration(address asset, uint256 configuration)
external
override
onlyLendingPoolConfigurator
{
_reserves[asset].configuration.data = configuration;
}
/**
* @dev Set the _pause state of a reserve
* - Only callable by the LendingPoolConfigurator contract
* @param val `true` to pause the reserve, `false` to un-pause it
*/
function setPause(bool val) external override onlyLendingPoolConfigurator {
_paused = val;
if (_paused) {
emit Paused();
} else {
emit Unpaused();
}
}
struct ExecuteBorrowParams {
address asset;
address user;
address onBehalfOf;
uint256 amount;
uint256 interestRateMode;
address aTokenAddress;
uint16 referralCode;
bool releaseUnderlying;
}
function _executeBorrow(ExecuteBorrowParams memory vars) internal {
DataTypes.ReserveData storage reserve = _reserves[vars.asset];
DataTypes.UserConfigurationMap storage userConfig = _usersConfig[
vars.onBehalfOf
];
address oracle = _addressesProvider.getPriceOracle();
uint256 amountInETH = IPriceOracleGetter(oracle)
.getAssetPrice(vars.asset)
.mul(vars.amount)
.div(10**reserve.configuration.getDecimals());
ValidationLogic.validateBorrow(
vars.asset,
reserve,
vars.onBehalfOf,
vars.amount,
amountInETH,
vars.interestRateMode,
_maxStableRateBorrowSizePercent,
_reserves,
userConfig,
_reservesList,
_reservesCount,
oracle
);
reserve.updateState();
uint256 currentStableRate = 0;
bool isFirstBorrowing = false;
if (
DataTypes.InterestRateMode(vars.interestRateMode) ==
DataTypes.InterestRateMode.STABLE
) {
currentStableRate = reserve.currentStableBorrowRate;
isFirstBorrowing = IStableDebtToken(reserve.stableDebtTokenAddress)
.mint(
vars.user,
vars.onBehalfOf,
vars.amount,
currentStableRate
);
} else {
isFirstBorrowing = IVariableDebtToken(
reserve.variableDebtTokenAddress
).mint(
vars.user,
vars.onBehalfOf,
vars.amount,
reserve.variableBorrowIndex
);
}
if (isFirstBorrowing) {
userConfig.setBorrowing(reserve.id, true);
}
reserve.updateInterestRates(
vars.asset,
vars.aTokenAddress,
0,
vars.releaseUnderlying ? vars.amount : 0
);
if (vars.releaseUnderlying) {
IAToken(vars.aTokenAddress).transferUnderlyingTo(
vars.user,
vars.amount
);
}
emit Borrow(
vars.asset,
vars.user,
vars.onBehalfOf,
vars.amount,
vars.interestRateMode,
DataTypes.InterestRateMode(vars.interestRateMode) ==
DataTypes.InterestRateMode.STABLE
? currentStableRate
: reserve.currentVariableBorrowRate,
vars.referralCode
);
}
function _addReserveToList(address asset) internal {
uint256 reservesCount = _reservesCount;
require(
reservesCount < _maxNumberOfReserves,
Errors.LP_NO_MORE_RESERVES_ALLOWED
);
bool reserveAlreadyAdded = _reserves[asset].id != 0 ||
_reservesList[0] == asset;
if (!reserveAlreadyAdded) {
_reserves[asset].id = uint8(reservesCount);
_reservesList[reservesCount] = asset;
_reservesCount = reservesCount + 1;
}
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import {IERC20} from "./IERC20.sol";
import {SafeMath} from "./SafeMath.sol";
import {Address} from "./Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
callOptionalReturn(
token,
abi.encodeWithSelector(token.transfer.selector, to, value)
);
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, value)
);
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
// solhint-disable-next-line max-line-length
require(
abi.decode(returndata, (bool)),
"SafeERC20: ERC20 operation did not succeed"
);
}
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @title LendingPoolAddressesProvider contract
* @dev Main registry of addresses part of or connected to the protocol, including permissioned roles
* - Acting also as factory of proxies and admin of those, so with right to change its implementations
* - Owned by the Aave Governance
* @author Aave
**/
interface ILendingPoolAddressesProvider {
event MarketIdSet(string newMarketId);
event LendingPoolUpdated(address indexed newAddress);
event ConfigurationAdminUpdated(address indexed newAddress);
event EmergencyAdminUpdated(address indexed newAddress);
event LendingPoolConfiguratorUpdated(address indexed newAddress);
event LendingPoolCollateralManagerUpdated(address indexed newAddress);
event PriceOracleUpdated(address indexed newAddress);
event LendingRateOracleUpdated(address indexed newAddress);
event ProxyCreated(bytes32 id, address indexed newAddress);
event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy);
function getMarketId() external view returns (string memory);
function setMarketId(string calldata marketId) external;
function setAddress(bytes32 id, address newAddress) external;
function setAddressAsProxy(bytes32 id, address impl) external;
function getAddress(bytes32 id) external view returns (address);
function getLendingPool() external view returns (address);
function setLendingPoolImpl(address pool) external;
function getLendingPoolConfigurator() external view returns (address);
function setLendingPoolConfiguratorImpl(address configurator) external;
function getLendingPoolCollateralManager() external view returns (address);
function setLendingPoolCollateralManager(address manager) external;
function getPoolAdmin() external view returns (address);
function setPoolAdmin(address admin) external;
function getEmergencyAdmin() external view returns (address);
function setEmergencyAdmin(address admin) external;
function getPriceOracle() external view returns (address);
function setPriceOracle(address priceOracle) external;
function getLendingRateOracle() external view returns (address);
function setLendingRateOracle(address lendingRateOracle) external;
function getLiquidationFeeTo() external view returns (address);
function setLiquidationFeeTo(address liquidationFeeTo) external;
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {IERC20} from "../dependencies/openzeppelin/contracts/IERC20.sol";
import {IScaledBalanceToken} from "./IScaledBalanceToken.sol";
import {IInitializableAToken} from "./IInitializableAToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";
interface IAToken is IERC20, IScaledBalanceToken, IInitializableAToken {
/**
* @dev Emitted after the mint action
* @param from The address performing the mint
* @param value The amount being
* @param index The new liquidity index of the reserve
**/
event Mint(address indexed from, uint256 value, uint256 index);
/**
* @dev Mints `amount` aTokens to `user`
* @param user The address receiving the minted tokens
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
* @return `true` if the the previous balance of the user was 0
*/
function mint(
address user,
uint256 amount,
uint256 index
) external returns (bool);
/**
* @dev Emitted after aTokens are burned
* @param from The owner of the aTokens, getting them burned
* @param target The address that will receive the underlying
* @param value The amount being burned
* @param index The new liquidity index of the reserve
**/
event Burn(
address indexed from,
address indexed target,
uint256 value,
uint256 index
);
/**
* @dev Emitted during the transfer action
* @param from The user whose tokens are being transferred
* @param to The recipient
* @param value The amount being transferred
* @param index The new liquidity index of the reserve
**/
event BalanceTransfer(
address indexed from,
address indexed to,
uint256 value,
uint256 index
);
/**
* @dev Burns aTokens from `user` and sends the equivalent amount of underlying to `receiverOfUnderlying`
* @param user The owner of the aTokens, getting them burned
* @param receiverOfUnderlying The address that will receive the underlying
* @param amount The amount being burned
* @param index The new liquidity index of the reserve
**/
function burn(
address user,
address receiverOfUnderlying,
uint256 amount,
uint256 index
) external;
/**
* @dev Mints aTokens to the reserve treasury
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
*/
function mintToTreasury(uint256 amount, uint256 index) external;
/**
* @dev Transfers aTokens in the event of a borrow being liquidated, in case the liquidators reclaims the aToken
* @param from The address getting liquidated, current owner of the aTokens
* @param to The recipient
* @param value The amount of tokens getting transferred
**/
function transferOnLiquidation(
address from,
address to,
uint256 value
) external;
/**
* @dev Transfers the underlying asset to `target`. Used by the LendingPool to transfer
* assets in borrow(), withdraw() and flashLoan()
* @param user The recipient of the underlying
* @param amount The amount getting transferred
* @return The amount transferred
**/
function transferUnderlyingTo(address user, uint256 amount)
external
returns (uint256);
/**
* @dev Invoked to execute actions on the aToken side after a repayment.
* @param user The user executing the repayment
* @param amount The amount getting repaid
**/
function handleRepayment(address user, uint256 amount) external;
/**
* @dev Returns the address of the incentives controller contract
**/
function getIncentivesController()
external
view
returns (IAaveIncentivesController);
/**
* @dev Returns the address of the underlying asset of this aToken (E.g. WETH for aWETH)
**/
function UNDERLYING_ASSET_ADDRESS() external view returns (address);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {IScaledBalanceToken} from "./IScaledBalanceToken.sol";
import {IInitializableDebtToken} from "./IInitializableDebtToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";
/**
* @title IVariableDebtToken
* @author Aave
* @notice Defines the basic interface for a variable debt token.
**/
interface IVariableDebtToken is IScaledBalanceToken, IInitializableDebtToken {
/**
* @dev Emitted after the mint action
* @param from The address performing the mint
* @param onBehalfOf The address of the user on which behalf minting has been performed
* @param value The amount to be minted
* @param index The last index of the reserve
**/
event Mint(
address indexed from,
address indexed onBehalfOf,
uint256 value,
uint256 index
);
/**
* @dev Mints debt token to the `onBehalfOf` address
* @param user The address receiving the borrowed underlying, being the delegatee in case
* of credit delegate, or same as `onBehalfOf` otherwise
* @param onBehalfOf The address receiving the debt tokens
* @param amount The amount of debt being minted
* @param index The variable debt index of the reserve
* @return `true` if the the previous balance of the user is 0
**/
function mint(
address user,
address onBehalfOf,
uint256 amount,
uint256 index
) external returns (bool);
/**
* @dev Emitted when variable debt is burnt
* @param user The user which debt has been burned
* @param amount The amount of debt being burned
* @param index The index of the user
**/
event Burn(address indexed user, uint256 amount, uint256 index);
/**
* @dev Burns user variable debt
* @param user The user which debt is burnt
* @param index The variable debt index of the reserve
**/
function burn(
address user,
uint256 amount,
uint256 index
) external;
/**
* @dev Returns the address of the incentives controller contract
**/
function getIncentivesController()
external
view
returns (IAaveIncentivesController);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {ILendingPool} from "../../interfaces/ILendingPool.sol";
/**
* @title IFlashLoanReceiver interface
* @notice Interface for the Aave fee IFlashLoanReceiver.
* @author Aave
* @dev implement this interface to develop a flashloan-compatible flashLoanReceiver contract
**/
interface IFlashLoanReceiver {
function executeOperation(
address[] calldata assets,
uint256[] calldata amounts,
uint256[] calldata premiums,
address initiator,
bytes calldata params
) external returns (bool);
function ADDRESSES_PROVIDER()
external
view
returns (ILendingPoolAddressesProvider);
function LENDING_POOL() external view returns (ILendingPool);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @title IPriceOracleGetter interface
* @notice Interface for the Aave price oracle.
**/
interface IPriceOracleGetter {
/**
* @dev returns the asset price in ETH
* @param asset the address of the asset
* @return the ETH price of the asset
**/
function getAssetPrice(address asset) external view returns (uint256);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {IInitializableDebtToken} from "./IInitializableDebtToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";
/**
* @title IStableDebtToken
* @notice Defines the interface for the stable debt token
* @dev It does not inherit from IERC20 to save in code size
* @author Aave
**/
interface IStableDebtToken is IInitializableDebtToken {
/**
* @dev Emitted when new stable debt is minted
* @param user The address of the user who triggered the minting
* @param onBehalfOf The recipient of stable debt tokens
* @param amount The amount minted
* @param currentBalance The current balance of the user
* @param balanceIncrease The increase in balance since the last action of the user
* @param newRate The rate of the debt after the minting
* @param avgStableRate The new average stable rate after the minting
* @param newTotalSupply The new total supply of the stable debt token after the action
**/
event Mint(
address indexed user,
address indexed onBehalfOf,
uint256 amount,
uint256 currentBalance,
uint256 balanceIncrease,
uint256 newRate,
uint256 avgStableRate,
uint256 newTotalSupply
);
/**
* @dev Emitted when new stable debt is burned
* @param user The address of the user
* @param amount The amount being burned
* @param currentBalance The current balance of the user
* @param balanceIncrease The the increase in balance since the last action of the user
* @param avgStableRate The new average stable rate after the burning
* @param newTotalSupply The new total supply of the stable debt token after the action
**/
event Burn(
address indexed user,
uint256 amount,
uint256 currentBalance,
uint256 balanceIncrease,
uint256 avgStableRate,
uint256 newTotalSupply
);
/**
* @dev Mints debt token to the `onBehalfOf` address.
* - The resulting rate is the weighted average between the rate of the new debt
* and the rate of the previous debt
* @param user The address receiving the borrowed underlying, being the delegatee in case
* of credit delegate, or same as `onBehalfOf` otherwise
* @param onBehalfOf The address receiving the debt tokens
* @param amount The amount of debt tokens to mint
* @param rate The rate of the debt being minted
**/
function mint(
address user,
address onBehalfOf,
uint256 amount,
uint256 rate
) external returns (bool);
/**
* @dev Burns debt of `user`
* - The resulting rate is the weighted average between the rate of the new debt
* and the rate of the previous debt
* @param user The address of the user getting his debt burned
* @param amount The amount of debt tokens getting burned
**/
function burn(address user, uint256 amount) external;
/**
* @dev Returns the average rate of all the stable rate loans.
* @return The average stable rate
**/
function getAverageStableRate() external view returns (uint256);
/**
* @dev Returns the stable rate of the user debt
* @return The stable rate of the user
**/
function getUserStableRate(address user) external view returns (uint256);
/**
* @dev Returns the timestamp of the last update of the user
* @return The timestamp
**/
function getUserLastUpdated(address user) external view returns (uint40);
/**
* @dev Returns the principal, the total supply and the average stable rate
**/
function getSupplyData()
external
view
returns (
uint256,
uint256,
uint256,
uint40
);
/**
* @dev Returns the timestamp of the last update of the total supply
* @return The timestamp
**/
function getTotalSupplyLastUpdated() external view returns (uint40);
/**
* @dev Returns the total supply and the average stable rate
**/
function getTotalSupplyAndAvgRate()
external
view
returns (uint256, uint256);
/**
* @dev Returns the principal debt balance of the user
* @return The debt balance of the user since the last burn/mint action
**/
function principalBalanceOf(address user) external view returns (uint256);
/**
* @dev Returns the address of the incentives controller contract
**/
function getIncentivesController()
external
view
returns (IAaveIncentivesController);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import {ILendingPoolAddressesProvider} from "./ILendingPoolAddressesProvider.sol";
import {DataTypes} from "../protocol/libraries/types/DataTypes.sol";
interface ILendingPool {
/**
* @dev Emitted on deposit()
* @param reserve The address of the underlying asset of the reserve
* @param user The address initiating the deposit
* @param onBehalfOf The beneficiary of the deposit, receiving the aTokens
* @param amount The amount deposited
* @param referral The referral code used
**/
event Deposit(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint16 indexed referral
);
/**
* @dev Emitted on withdraw()
* @param reserve The address of the underlyng asset being withdrawn
* @param user The address initiating the withdrawal, owner of aTokens
* @param to Address that will receive the underlying
* @param amount The amount to be withdrawn
**/
event Withdraw(
address indexed reserve,
address indexed user,
address indexed to,
uint256 amount
);
/**
* @dev Emitted on borrow() and flashLoan() when debt needs to be opened
* @param reserve The address of the underlying asset being borrowed
* @param user The address of the user initiating the borrow(), receiving the funds on borrow() or just
* initiator of the transaction on flashLoan()
* @param onBehalfOf The address that will be getting the debt
* @param amount The amount borrowed out
* @param borrowRateMode The rate mode: 1 for Stable, 2 for Variable
* @param borrowRate The numeric rate at which the user has borrowed
* @param referral The referral code used
**/
event Borrow(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint256 borrowRateMode,
uint256 borrowRate,
uint16 indexed referral
);
/**
* @dev Emitted on repay()
* @param reserve The address of the underlying asset of the reserve
* @param user The beneficiary of the repayment, getting his debt reduced
* @param repayer The address of the user initiating the repay(), providing the funds
* @param amount The amount repaid
**/
event Repay(
address indexed reserve,
address indexed user,
address indexed repayer,
uint256 amount
);
/**
* @dev Emitted on swapBorrowRateMode()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user swapping his rate mode
* @param rateMode The rate mode that the user wants to swap to
**/
event Swap(address indexed reserve, address indexed user, uint256 rateMode);
/**
* @dev Emitted on setUserUseReserveAsCollateral()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user enabling the usage as collateral
**/
event ReserveUsedAsCollateralEnabled(
address indexed reserve,
address indexed user
);
/**
* @dev Emitted on setUserUseReserveAsCollateral()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user enabling the usage as collateral
**/
event ReserveUsedAsCollateralDisabled(
address indexed reserve,
address indexed user
);
/**
* @dev Emitted on rebalanceStableBorrowRate()
* @param reserve The address of the underlying asset of the reserve
* @param user The address of the user for which the rebalance has been executed
**/
event RebalanceStableBorrowRate(
address indexed reserve,
address indexed user
);
/**
* @dev Emitted on flashLoan()
* @param target The address of the flash loan receiver contract
* @param initiator The address initiating the flash loan
* @param asset The address of the asset being flash borrowed
* @param amount The amount flash borrowed
* @param premium The fee flash borrowed
* @param referralCode The referral code used
**/
event FlashLoan(
address indexed target,
address indexed initiator,
address indexed asset,
uint256 amount,
uint256 premium,
uint16 referralCode
);
/**
* @dev Emitted when the pause is triggered.
*/
event Paused();
/**
* @dev Emitted when the pause is lifted.
*/
event Unpaused();
/**
* @dev Emitted when a borrower is liquidated. This event is emitted by the LendingPool via
* LendingPoolCollateral manager using a DELEGATECALL
* This allows to have the events in the generated ABI for LendingPool.
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
* @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
* @param user The address of the borrower getting liquidated
* @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
* @param liquidatedCollateralAmount The amount of collateral received by the liiquidator
* @param liquidator The address of the liquidator
* @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
* to receive the underlying collateral asset directly
**/
event LiquidationCall(
address indexed collateralAsset,
address indexed debtAsset,
address indexed user,
uint256 debtToCover,
uint256 liquidatedCollateralAmount,
address liquidator,
bool receiveAToken
);
/**
* @dev Emitted when the state of a reserve is updated. NOTE: This event is actually declared
* in the ReserveLogic library and emitted in the updateInterestRates() function. Since the function is internal,
* the event will actually be fired by the LendingPool contract. The event is therefore replicated here so it
* gets added to the LendingPool ABI
* @param reserve The address of the underlying asset of the reserve
* @param liquidityRate The new liquidity rate
* @param stableBorrowRate The new stable borrow rate
* @param variableBorrowRate The new variable borrow rate
* @param liquidityIndex The new liquidity index
* @param variableBorrowIndex The new variable borrow index
**/
event ReserveDataUpdated(
address indexed reserve,
uint256 liquidityRate,
uint256 stableBorrowRate,
uint256 variableBorrowRate,
uint256 liquidityIndex,
uint256 variableBorrowIndex
);
/**
* @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
* - E.g. User deposits 100 USDC and gets in return 100 aUSDC
* @param asset The address of the underlying asset to deposit
* @param amount The amount to be deposited
* @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
* wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
* is a different wallet
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
/**
* @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
* E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
* @param asset The address of the underlying asset to withdraw
* @param amount The underlying amount to be withdrawn
* - Send the value type(uint256).max in order to withdraw the whole aToken balance
* @param to Address that will receive the underlying, same as msg.sender if the user
* wants to receive it on his own wallet, or a different address if the beneficiary is a
* different wallet
* @return The final amount withdrawn
**/
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
* already deposited enough collateral, or he was given enough allowance by a credit delegator on the
* corresponding debt token (StableDebtToken or VariableDebtToken)
* - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
* and 100 stable/variable debt tokens, depending on the `interestRateMode`
* @param asset The address of the underlying asset to borrow
* @param amount The amount to be borrowed
* @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
* @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
* calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
* if he has been given credit delegation allowance
**/
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external;
/**
* @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
* - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
* @param asset The address of the borrowed underlying asset previously borrowed
* @param amount The amount to repay
* - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
* @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
* @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
* user calling the function if he wants to reduce/remove his own debt, or the address of any other
* other borrower whose debt should be removed
* @return The final amount repaid
**/
function repay(
address asset,
uint256 amount,
uint256 rateMode,
address onBehalfOf
) external returns (uint256);
/**
* @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
* @param asset The address of the underlying asset borrowed
* @param rateMode The rate mode that the user wants to swap to
**/
function swapBorrowRateMode(address asset, uint256 rateMode) external;
/**
* @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
* - Users can be rebalanced if the following conditions are satisfied:
* 1. Usage ratio is above 95%
* 2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been
* borrowed at a stable rate and depositors are not earning enough
* @param asset The address of the underlying asset borrowed
* @param user The address of the user to be rebalanced
**/
function rebalanceStableBorrowRate(address asset, address user) external;
/**
* @dev Allows depositors to enable/disable a specific deposited asset as collateral
* @param asset The address of the underlying asset deposited
* @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
**/
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral)
external;
/**
* @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
* - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
* a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
* @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
* @param user The address of the borrower getting liquidated
* @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
* @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
* to receive the underlying collateral asset directly
**/
function liquidationCall(
address collateralAsset,
address debtAsset,
address user,
uint256 debtToCover,
bool receiveAToken
) external;
/**
* @dev Allows smartcontracts to access the liquidity of the pool within one transaction,
* as long as the amount taken plus a fee is returned.
* IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration.
* For further details please visit https://developers.aave.com
* @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
* @param assets The addresses of the assets being flash-borrowed
* @param amounts The amounts amounts being flash-borrowed
* @param modes Types of the debt to open if the flash loan is not returned:
* 0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
* 1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* 2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
* @param onBehalfOf The address that will receive the debt in the case of using on `modes` 1 or 2
* @param params Variadic packed params to pass to the receiver as extra information
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function flashLoan(
address receiverAddress,
address[] calldata assets,
uint256[] calldata amounts,
uint256[] calldata modes,
address onBehalfOf,
bytes calldata params,
uint16 referralCode
) external;
/**
* @dev Returns the user account data across all the reserves
* @param user The address of the user
* @return totalCollateralETH the total collateral in ETH of the user
* @return totalDebtETH the total debt in ETH of the user
* @return availableBorrowsETH the borrowing power left of the user
* @return currentLiquidationThreshold the liquidation threshold of the user
* @return ltv the loan to value of the user
* @return healthFactor the current health factor of the user
**/
function getUserAccountData(address user)
external
view
returns (
uint256 totalCollateralETH,
uint256 totalDebtETH,
uint256 availableBorrowsETH,
uint256 currentLiquidationThreshold,
uint256 ltv,
uint256 healthFactor
);
function initReserve(
address reserve,
address aTokenAddress,
address stableDebtAddress,
address variableDebtAddress,
address interestRateStrategyAddress
) external;
function setReserveInterestRateStrategyAddress(
address reserve,
address rateStrategyAddress
) external;
function setConfiguration(address reserve, uint256 configuration) external;
/**
* @dev Returns the configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The configuration of the reserve
**/
function getConfiguration(address asset)
external
view
returns (DataTypes.ReserveConfigurationMap memory);
/**
* @dev Returns the configuration of the user across all the reserves
* @param user The user address
* @return The configuration of the user
**/
function getUserConfiguration(address user)
external
view
returns (DataTypes.UserConfigurationMap memory);
/**
* @dev Returns the normalized income normalized income of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The reserve's normalized income
*/
function getReserveNormalizedIncome(address asset)
external
view
returns (uint256);
/**
* @dev Returns the normalized variable debt per unit of asset
* @param asset The address of the underlying asset of the reserve
* @return The reserve normalized variable debt
*/
function getReserveNormalizedVariableDebt(address asset)
external
view
returns (uint256);
/**
* @dev Returns the state and configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The state of the reserve
**/
function getReserveData(address asset)
external
view
returns (DataTypes.ReserveData memory);
function finalizeTransfer(
address asset,
address from,
address to,
uint256 amount,
uint256 balanceFromAfter,
uint256 balanceToBefore
) external;
function getReservesList() external view returns (address[] memory);
function getAddressesProvider()
external
view
returns (ILendingPoolAddressesProvider);
function setPause(bool val) external;
function paused() external view returns (bool);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @title VersionedInitializable
*
* @dev Helper contract to implement initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*
* @author Aave, inspired by the OpenZeppelin Initializable contract
*/
abstract contract VersionedInitializable {
/**
* @dev Indicates that the contract has been initialized.
*/
uint256 private lastInitializedRevision = 0;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
uint256 revision = getRevision();
require(
initializing ||
isConstructor() ||
revision > lastInitializedRevision,
"Contract instance has already been initialized"
);
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
lastInitializedRevision = revision;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/**
* @dev returns the revision number of the contract
* Needs to be defined in the inherited class as a constant.
**/
function getRevision() internal pure virtual returns (uint256);
/**
* @dev Returns true if and only if the function is running in the constructor
**/
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
uint256 cs;
//solium-disable-next-line
assembly {
cs := extcodesize(address())
}
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {IERC20} from "../../../dependencies/openzeppelin/contracts/IERC20.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title Helpers library
* @author Aave
*/
library Helpers {
/**
* @dev Fetches the user current stable and variable debt balances
* @param user The user address
* @param reserve The reserve data object
* @return The stable and variable debt balance
**/
function getUserCurrentDebt(
address user,
DataTypes.ReserveData storage reserve
) internal view returns (uint256, uint256) {
return (
IERC20(reserve.stableDebtTokenAddress).balanceOf(user),
IERC20(reserve.variableDebtTokenAddress).balanceOf(user)
);
}
function getUserCurrentDebtMemory(
address user,
DataTypes.ReserveData memory reserve
) internal view returns (uint256, uint256) {
return (
IERC20(reserve.stableDebtTokenAddress).balanceOf(user),
IERC20(reserve.variableDebtTokenAddress).balanceOf(user)
);
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @title Errors library
* @author Aave
* @notice Defines the error messages emitted by the different contracts of the Aave protocol
* @dev Error messages prefix glossary:
* - VL = ValidationLogic
* - MATH = Math libraries
* - CT = Common errors between tokens (AToken, VariableDebtToken and StableDebtToken)
* - AT = AToken
* - SDT = StableDebtToken
* - VDT = VariableDebtToken
* - LP = LendingPool
* - LPAPR = LendingPoolAddressesProviderRegistry
* - LPC = LendingPoolConfiguration
* - RL = ReserveLogic
* - LPCM = LendingPoolCollateralManager
* - P = Pausable
*/
library Errors {
//common errors
string public constant CALLER_NOT_POOL_ADMIN = "33"; // 'The caller must be the pool admin'
string public constant BORROW_ALLOWANCE_NOT_ENOUGH = "59"; // User borrows on behalf, but allowance are too small
//contract specific errors
string public constant VL_INVALID_AMOUNT = "1"; // 'Amount must be greater than 0'
string public constant VL_NO_ACTIVE_RESERVE = "2"; // 'Action requires an active reserve'
string public constant VL_RESERVE_FROZEN = "3"; // 'Action cannot be performed because the reserve is frozen'
string public constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = "4"; // 'The current liquidity is not enough'
string public constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = "5"; // 'User cannot withdraw more than the available balance'
string public constant VL_TRANSFER_NOT_ALLOWED = "6"; // 'Transfer cannot be allowed.'
string public constant VL_BORROWING_NOT_ENABLED = "7"; // 'Borrowing is not enabled'
string public constant VL_INVALID_INTEREST_RATE_MODE_SELECTED = "8"; // 'Invalid interest rate mode selected'
string public constant VL_COLLATERAL_BALANCE_IS_0 = "9"; // 'The collateral balance is 0'
string public constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD =
"10"; // 'Health factor is lesser than the liquidation threshold'
string public constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = "11"; // 'There is not enough collateral to cover a new borrow'
string public constant VL_STABLE_BORROWING_NOT_ENABLED = "12"; // stable borrowing not enabled
string public constant VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY = "13"; // collateral is (mostly) the same currency that is being borrowed
string public constant VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE = "14"; // 'The requested amount is greater than the max loan size in stable rate mode
string public constant VL_NO_DEBT_OF_SELECTED_TYPE = "15"; // 'for repayment of stable debt, the user needs to have stable debt, otherwise, he needs to have variable debt'
string public constant VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF = "16"; // 'To repay on behalf of an user an explicit amount to repay is needed'
string public constant VL_NO_STABLE_RATE_LOAN_IN_RESERVE = "17"; // 'User does not have a stable rate loan in progress on this reserve'
string public constant VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE = "18"; // 'User does not have a variable rate loan in progress on this reserve'
string public constant VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0 = "19"; // 'The underlying balance needs to be greater than 0'
string public constant VL_DEPOSIT_ALREADY_IN_USE = "20"; // 'User deposit is already being used as collateral'
string public constant LP_NOT_ENOUGH_STABLE_BORROW_BALANCE = "21"; // 'User does not have any stable rate loan for this reserve'
string public constant LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = "22"; // 'Interest rate rebalance conditions were not met'
string public constant LP_LIQUIDATION_CALL_FAILED = "23"; // 'Liquidation call failed'
string public constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = "24"; // 'There is not enough liquidity available to borrow'
string public constant LP_REQUESTED_AMOUNT_TOO_SMALL = "25"; // 'The requested amount is too small for a FlashLoan.'
string public constant LP_INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = "26"; // 'The actual balance of the protocol is inconsistent'
string public constant LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR = "27"; // 'The caller of the function is not the lending pool configurator'
string public constant LP_INCONSISTENT_FLASHLOAN_PARAMS = "28";
string public constant CT_CALLER_MUST_BE_LENDING_POOL = "29"; // 'The caller of this function must be a lending pool'
string public constant CT_CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = "30"; // 'User cannot give allowance to himself'
string public constant CT_TRANSFER_AMOUNT_NOT_GT_0 = "31"; // 'Transferred amount needs to be greater than zero'
string public constant RL_RESERVE_ALREADY_INITIALIZED = "32"; // 'Reserve has already been initialized'
string public constant LPC_RESERVE_LIQUIDITY_NOT_0 = "34"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ATOKEN_POOL_ADDRESS = "35"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_POOL_ADDRESS = "36"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_POOL_ADDRESS = "37"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_UNDERLYING_ADDRESS =
"38"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_UNDERLYING_ADDRESS =
"39"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ADDRESSES_PROVIDER_ID = "40"; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_CONFIGURATION = "75"; // 'Invalid risk parameters for the reserve'
string public constant LPC_CALLER_NOT_EMERGENCY_ADMIN = "76"; // 'The caller must be the emergency admin'
string public constant LPAPR_PROVIDER_NOT_REGISTERED = "41"; // 'Provider is not registered'
string public constant LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD = "42"; // 'Health factor is not below the threshold'
string public constant LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED = "43"; // 'The collateral chosen cannot be liquidated'
string public constant LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = "44"; // 'User did not borrow the specified currency'
string public constant LPCM_NOT_ENOUGH_LIQUIDITY_TO_LIQUIDATE = "45"; // "There isn't enough liquidity available to liquidate"
string public constant LPCM_NO_ERRORS = "46"; // 'No errors'
string public constant LP_INVALID_FLASHLOAN_MODE = "47"; //Invalid flashloan mode selected
string public constant MATH_MULTIPLICATION_OVERFLOW = "48";
string public constant MATH_ADDITION_OVERFLOW = "49";
string public constant MATH_DIVISION_BY_ZERO = "50";
string public constant RL_LIQUIDITY_INDEX_OVERFLOW = "51"; // Liquidity index overflows uint128
string public constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = "52"; // Variable borrow index overflows uint128
string public constant RL_LIQUIDITY_RATE_OVERFLOW = "53"; // Liquidity rate overflows uint128
string public constant RL_VARIABLE_BORROW_RATE_OVERFLOW = "54"; // Variable borrow rate overflows uint128
string public constant RL_STABLE_BORROW_RATE_OVERFLOW = "55"; // Stable borrow rate overflows uint128
string public constant CT_INVALID_MINT_AMOUNT = "56"; //invalid amount to mint
string public constant LP_FAILED_REPAY_WITH_COLLATERAL = "57";
string public constant CT_INVALID_BURN_AMOUNT = "58"; //invalid amount to burn
string public constant LP_FAILED_COLLATERAL_SWAP = "60";
string public constant LP_INVALID_EQUAL_ASSETS_TO_SWAP = "61";
string public constant LP_REENTRANCY_NOT_ALLOWED = "62";
string public constant LP_CALLER_MUST_BE_AN_ATOKEN = "63";
string public constant LP_IS_PAUSED = "64"; // 'Pool is paused'
string public constant LP_NO_MORE_RESERVES_ALLOWED = "65";
string public constant LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN = "66";
string public constant RC_INVALID_LTV = "67";
string public constant RC_INVALID_LIQ_THRESHOLD = "68";
string public constant RC_INVALID_LIQ_BONUS = "69";
string public constant RC_INVALID_DECIMALS = "70";
string public constant RC_INVALID_RESERVE_FACTOR = "71";
string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = "72";
string public constant VL_INCONSISTENT_FLASHLOAN_PARAMS = "73";
string public constant LP_INCONSISTENT_PARAMS_LENGTH = "74";
string public constant UL_INVALID_INDEX = "77";
string public constant LP_NOT_CONTRACT = "78";
string public constant SDT_STABLE_DEBT_OVERFLOW = "79";
string public constant SDT_BURN_EXCEEDS_BALANCE = "80";
enum CollateralManagerErrors {
NO_ERROR,
NO_COLLATERAL_AVAILABLE,
COLLATERAL_CANNOT_BE_LIQUIDATED,
CURRRENCY_NOT_BORROWED,
HEALTH_FACTOR_ABOVE_THRESHOLD,
NOT_ENOUGH_LIQUIDITY,
NO_ACTIVE_RESERVE,
HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD,
INVALID_EQUAL_ASSETS_TO_SWAP,
FROZEN_RESERVE
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {Errors} from "../helpers/Errors.sol";
/**
* @title WadRayMath library
* @author Aave
* @dev Provides mul and div function for wads (decimal numbers with 18 digits precision) and rays (decimals with 27 digits)
**/
library WadRayMath {
uint256 internal constant WAD = 1e18;
uint256 internal constant halfWAD = WAD / 2;
uint256 internal constant RAY = 1e27;
uint256 internal constant halfRAY = RAY / 2;
uint256 internal constant WAD_RAY_RATIO = 1e9;
/**
* @return One ray, 1e27
**/
function ray() internal pure returns (uint256) {
return RAY;
}
/**
* @return One wad, 1e18
**/
function wad() internal pure returns (uint256) {
return WAD;
}
/**
* @return Half ray, 1e27/2
**/
function halfRay() internal pure returns (uint256) {
return halfRAY;
}
/**
* @return Half ray, 1e18/2
**/
function halfWad() internal pure returns (uint256) {
return halfWAD;
}
/**
* @dev Multiplies two wad, rounding half up to the nearest wad
* @param a Wad
* @param b Wad
* @return The result of a*b, in wad
**/
function wadMul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0 || b == 0) {
return 0;
}
require(
a <= (type(uint256).max - halfWAD) / b,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (a * b + halfWAD) / WAD;
}
/**
* @dev Divides two wad, rounding half up to the nearest wad
* @param a Wad
* @param b Wad
* @return The result of a/b, in wad
**/
function wadDiv(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfB = b / 2;
require(
a <= (type(uint256).max - halfB) / WAD,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (a * WAD + halfB) / b;
}
/**
* @dev Multiplies two ray, rounding half up to the nearest ray
* @param a Ray
* @param b Ray
* @return The result of a*b, in ray
**/
function rayMul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0 || b == 0) {
return 0;
}
require(
a <= (type(uint256).max - halfRAY) / b,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (a * b + halfRAY) / RAY;
}
/**
* @dev Divides two ray, rounding half up to the nearest ray
* @param a Ray
* @param b Ray
* @return The result of a/b, in ray
**/
function rayDiv(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfB = b / 2;
require(
a <= (type(uint256).max - halfB) / RAY,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (a * RAY + halfB) / b;
}
/**
* @dev Casts ray down to wad
* @param a Ray
* @return a casted to wad, rounded half up to the nearest wad
**/
function rayToWad(uint256 a) internal pure returns (uint256) {
uint256 halfRatio = WAD_RAY_RATIO / 2;
uint256 result = halfRatio + a;
require(result >= halfRatio, Errors.MATH_ADDITION_OVERFLOW);
return result / WAD_RAY_RATIO;
}
/**
* @dev Converts wad up to ray
* @param a Wad
* @return a converted in ray
**/
function wadToRay(uint256 a) internal pure returns (uint256) {
uint256 result = a * WAD_RAY_RATIO;
require(
result / WAD_RAY_RATIO == a,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return result;
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {Errors} from "../helpers/Errors.sol";
/**
* @title PercentageMath library
* @author Aave
* @notice Provides functions to perform percentage calculations
* @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR
* @dev Operations are rounded half up
**/
library PercentageMath {
uint256 constant PERCENTAGE_FACTOR = 1e4; //percentage plus two decimals
uint256 constant HALF_PERCENT = PERCENTAGE_FACTOR / 2;
/**
* @dev Executes a percentage multiplication
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return The percentage of value
**/
function percentMul(uint256 value, uint256 percentage)
internal
pure
returns (uint256)
{
if (value == 0 || percentage == 0) {
return 0;
}
require(
value <= (type(uint256).max - HALF_PERCENT) / percentage,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (value * percentage + HALF_PERCENT) / PERCENTAGE_FACTOR;
}
/**
* @dev Executes a percentage division
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return The value divided the percentage
**/
function percentDiv(uint256 value, uint256 percentage)
internal
pure
returns (uint256)
{
require(percentage != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfPercentage = percentage / 2;
require(
value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR,
Errors.MATH_MULTIPLICATION_OVERFLOW
);
return (value * PERCENTAGE_FACTOR + halfPercentage) / percentage;
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {IERC20} from "../../../dependencies/openzeppelin/contracts/IERC20.sol";
import {SafeERC20} from "../../../dependencies/openzeppelin/contracts/SafeERC20.sol";
import {IAToken} from "../../../interfaces/IAToken.sol";
import {IStableDebtToken} from "../../../interfaces/IStableDebtToken.sol";
import {IVariableDebtToken} from "../../../interfaces/IVariableDebtToken.sol";
import {IReserveInterestRateStrategy} from "../../../interfaces/IReserveInterestRateStrategy.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {MathUtils} from "../math/MathUtils.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title ReserveLogic library
* @author Aave
* @notice Implements the logic to update the reserves state
*/
library ReserveLogic {
using SafeMath for uint256;
using WadRayMath for uint256;
using PercentageMath for uint256;
using SafeERC20 for IERC20;
/**
* @dev Emitted when the state of a reserve is updated
* @param asset The address of the underlying asset of the reserve
* @param liquidityRate The new liquidity rate
* @param stableBorrowRate The new stable borrow rate
* @param variableBorrowRate The new variable borrow rate
* @param liquidityIndex The new liquidity index
* @param variableBorrowIndex The new variable borrow index
**/
event ReserveDataUpdated(
address indexed asset,
uint256 liquidityRate,
uint256 stableBorrowRate,
uint256 variableBorrowRate,
uint256 liquidityIndex,
uint256 variableBorrowIndex
);
using ReserveLogic for DataTypes.ReserveData;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
/**
* @dev Returns the ongoing normalized income for the reserve
* A value of 1e27 means there is no income. As time passes, the income is accrued
* A value of 2*1e27 means for each unit of asset one unit of income has been accrued
* @param reserve The reserve object
* @return the normalized income. expressed in ray
**/
function getNormalizedIncome(DataTypes.ReserveData storage reserve)
internal
view
returns (uint256)
{
uint40 timestamp = reserve.lastUpdateTimestamp;
//solium-disable-next-line
if (timestamp == uint40(block.timestamp)) {
//if the index was updated in the same block, no need to perform any calculation
return reserve.liquidityIndex;
}
uint256 cumulated = MathUtils
.calculateLinearInterest(reserve.currentLiquidityRate, timestamp)
.rayMul(reserve.liquidityIndex);
return cumulated;
}
/**
* @dev Returns the ongoing normalized variable debt for the reserve
* A value of 1e27 means there is no debt. As time passes, the income is accrued
* A value of 2*1e27 means that for each unit of debt, one unit worth of interest has been accumulated
* @param reserve The reserve object
* @return The normalized variable debt. expressed in ray
**/
function getNormalizedDebt(DataTypes.ReserveData storage reserve)
internal
view
returns (uint256)
{
uint40 timestamp = reserve.lastUpdateTimestamp;
//solium-disable-next-line
if (timestamp == uint40(block.timestamp)) {
//if the index was updated in the same block, no need to perform any calculation
return reserve.variableBorrowIndex;
}
uint256 cumulated = MathUtils
.calculateCompoundedInterest(
reserve.currentVariableBorrowRate,
timestamp
)
.rayMul(reserve.variableBorrowIndex);
return cumulated;
}
/**
* @dev Updates the liquidity cumulative index and the variable borrow index.
* @param reserve the reserve object
**/
function updateState(DataTypes.ReserveData storage reserve) internal {
uint256 scaledVariableDebt = IVariableDebtToken(
reserve.variableDebtTokenAddress
).scaledTotalSupply();
uint256 previousVariableBorrowIndex = reserve.variableBorrowIndex;
uint256 previousLiquidityIndex = reserve.liquidityIndex;
uint40 lastUpdatedTimestamp = reserve.lastUpdateTimestamp;
(
uint256 newLiquidityIndex,
uint256 newVariableBorrowIndex
) = _updateIndexes(
reserve,
scaledVariableDebt,
previousLiquidityIndex,
previousVariableBorrowIndex,
lastUpdatedTimestamp
);
_mintToTreasury(
reserve,
scaledVariableDebt,
previousVariableBorrowIndex,
newLiquidityIndex,
newVariableBorrowIndex,
lastUpdatedTimestamp
);
}
/**
* @dev Accumulates a predefined amount of asset to the reserve as a fixed, instantaneous income. Used for example to accumulate
* the flashloan fee to the reserve, and spread it between all the depositors
* @param reserve The reserve object
* @param totalLiquidity The total liquidity available in the reserve
* @param amount The amount to accomulate
**/
function cumulateToLiquidityIndex(
DataTypes.ReserveData storage reserve,
uint256 totalLiquidity,
uint256 amount
) internal {
uint256 amountToLiquidityRatio = amount.wadToRay().rayDiv(
totalLiquidity.wadToRay()
);
uint256 result = amountToLiquidityRatio.add(WadRayMath.ray());
result = result.rayMul(reserve.liquidityIndex);
require(
result <= type(uint128).max,
Errors.RL_LIQUIDITY_INDEX_OVERFLOW
);
reserve.liquidityIndex = uint128(result);
}
/**
* @dev Initializes a reserve
* @param reserve The reserve object
* @param aTokenAddress The address of the overlying atoken contract
* @param interestRateStrategyAddress The address of the interest rate strategy contract
**/
function init(
DataTypes.ReserveData storage reserve,
address aTokenAddress,
address stableDebtTokenAddress,
address variableDebtTokenAddress,
address interestRateStrategyAddress
) external {
require(
reserve.aTokenAddress == address(0),
Errors.RL_RESERVE_ALREADY_INITIALIZED
);
reserve.liquidityIndex = uint128(WadRayMath.ray());
reserve.variableBorrowIndex = uint128(WadRayMath.ray());
reserve.aTokenAddress = aTokenAddress;
reserve.stableDebtTokenAddress = stableDebtTokenAddress;
reserve.variableDebtTokenAddress = variableDebtTokenAddress;
reserve.interestRateStrategyAddress = interestRateStrategyAddress;
}
struct UpdateInterestRatesLocalVars {
address stableDebtTokenAddress;
uint256 availableLiquidity;
uint256 totalStableDebt;
uint256 newLiquidityRate;
uint256 newStableRate;
uint256 newVariableRate;
uint256 avgStableRate;
uint256 totalVariableDebt;
}
/**
* @dev Updates the reserve current stable borrow rate, the current variable borrow rate and the current liquidity rate
* @param reserve The address of the reserve to be updated
* @param liquidityAdded The amount of liquidity added to the protocol (deposit or repay) in the previous action
* @param liquidityTaken The amount of liquidity taken from the protocol (redeem or borrow)
**/
function updateInterestRates(
DataTypes.ReserveData storage reserve,
address reserveAddress,
address aTokenAddress,
uint256 liquidityAdded,
uint256 liquidityTaken
) internal {
UpdateInterestRatesLocalVars memory vars;
vars.stableDebtTokenAddress = reserve.stableDebtTokenAddress;
(vars.totalStableDebt, vars.avgStableRate) = IStableDebtToken(
vars.stableDebtTokenAddress
).getTotalSupplyAndAvgRate();
//calculates the total variable debt locally using the scaled total supply instead
//of totalSupply(), as it's noticeably cheaper. Also, the index has been
//updated by the previous updateState() call
vars.totalVariableDebt = IVariableDebtToken(
reserve.variableDebtTokenAddress
).scaledTotalSupply().rayMul(reserve.variableBorrowIndex);
(
vars.newLiquidityRate,
vars.newStableRate,
vars.newVariableRate
) = IReserveInterestRateStrategy(reserve.interestRateStrategyAddress)
.calculateInterestRates(
reserveAddress,
aTokenAddress,
liquidityAdded,
liquidityTaken,
vars.totalStableDebt,
vars.totalVariableDebt,
vars.avgStableRate,
reserve.configuration.getReserveFactor()
);
require(
vars.newLiquidityRate <= type(uint128).max,
Errors.RL_LIQUIDITY_RATE_OVERFLOW
);
require(
vars.newStableRate <= type(uint128).max,
Errors.RL_STABLE_BORROW_RATE_OVERFLOW
);
require(
vars.newVariableRate <= type(uint128).max,
Errors.RL_VARIABLE_BORROW_RATE_OVERFLOW
);
reserve.currentLiquidityRate = uint128(vars.newLiquidityRate);
reserve.currentStableBorrowRate = uint128(vars.newStableRate);
reserve.currentVariableBorrowRate = uint128(vars.newVariableRate);
emit ReserveDataUpdated(
reserveAddress,
vars.newLiquidityRate,
vars.newStableRate,
vars.newVariableRate,
reserve.liquidityIndex,
reserve.variableBorrowIndex
);
}
struct MintToTreasuryLocalVars {
uint256 currentStableDebt;
uint256 principalStableDebt;
uint256 previousStableDebt;
uint256 currentVariableDebt;
uint256 previousVariableDebt;
uint256 avgStableRate;
uint256 cumulatedStableInterest;
uint256 totalDebtAccrued;
uint256 amountToMint;
uint256 reserveFactor;
uint40 stableSupplyUpdatedTimestamp;
}
/**
* @dev Mints part of the repaid interest to the reserve treasury as a function of the reserveFactor for the
* specific asset.
* @param reserve The reserve reserve to be updated
* @param scaledVariableDebt The current scaled total variable debt
* @param previousVariableBorrowIndex The variable borrow index before the last accumulation of the interest
* @param newLiquidityIndex The new liquidity index
* @param newVariableBorrowIndex The variable borrow index after the last accumulation of the interest
**/
function _mintToTreasury(
DataTypes.ReserveData storage reserve,
uint256 scaledVariableDebt,
uint256 previousVariableBorrowIndex,
uint256 newLiquidityIndex,
uint256 newVariableBorrowIndex,
uint40 timestamp
) internal {
MintToTreasuryLocalVars memory vars;
vars.reserveFactor = reserve.configuration.getReserveFactor();
if (vars.reserveFactor == 0) {
return;
}
//fetching the principal, total stable debt and the avg stable rate
(
vars.principalStableDebt,
vars.currentStableDebt,
vars.avgStableRate,
vars.stableSupplyUpdatedTimestamp
) = IStableDebtToken(reserve.stableDebtTokenAddress).getSupplyData();
//calculate the last principal variable debt
vars.previousVariableDebt = scaledVariableDebt.rayMul(
previousVariableBorrowIndex
);
//calculate the new total supply after accumulation of the index
vars.currentVariableDebt = scaledVariableDebt.rayMul(
newVariableBorrowIndex
);
//calculate the stable debt until the last timestamp update
vars.cumulatedStableInterest = MathUtils.calculateCompoundedInterest(
vars.avgStableRate,
vars.stableSupplyUpdatedTimestamp,
timestamp
);
vars.previousStableDebt = vars.principalStableDebt.rayMul(
vars.cumulatedStableInterest
);
//debt accrued is the sum of the current debt minus the sum of the debt at the last update
vars.totalDebtAccrued = vars
.currentVariableDebt
.add(vars.currentStableDebt)
.sub(vars.previousVariableDebt)
.sub(vars.previousStableDebt);
vars.amountToMint = vars.totalDebtAccrued.percentMul(
vars.reserveFactor
);
if (vars.amountToMint != 0) {
IAToken(reserve.aTokenAddress).mintToTreasury(
vars.amountToMint,
newLiquidityIndex
);
}
}
/**
* @dev Updates the reserve indexes and the timestamp of the update
* @param reserve The reserve reserve to be updated
* @param scaledVariableDebt The scaled variable debt
* @param liquidityIndex The last stored liquidity index
* @param variableBorrowIndex The last stored variable borrow index
**/
function _updateIndexes(
DataTypes.ReserveData storage reserve,
uint256 scaledVariableDebt,
uint256 liquidityIndex,
uint256 variableBorrowIndex,
uint40 timestamp
) internal returns (uint256, uint256) {
uint256 currentLiquidityRate = reserve.currentLiquidityRate;
uint256 newLiquidityIndex = liquidityIndex;
uint256 newVariableBorrowIndex = variableBorrowIndex;
//only cumulating if there is any income being produced
if (currentLiquidityRate > 0) {
uint256 cumulatedLiquidityInterest = MathUtils
.calculateLinearInterest(currentLiquidityRate, timestamp);
newLiquidityIndex = cumulatedLiquidityInterest.rayMul(
liquidityIndex
);
require(
newLiquidityIndex <= type(uint128).max,
Errors.RL_LIQUIDITY_INDEX_OVERFLOW
);
reserve.liquidityIndex = uint128(newLiquidityIndex);
//as the liquidity rate might come only from stable rate loans, we need to ensure
//that there is actual variable debt before accumulating
if (scaledVariableDebt != 0) {
uint256 cumulatedVariableBorrowInterest = MathUtils
.calculateCompoundedInterest(
reserve.currentVariableBorrowRate,
timestamp
);
newVariableBorrowIndex = cumulatedVariableBorrowInterest.rayMul(
variableBorrowIndex
);
require(
newVariableBorrowIndex <= type(uint128).max,
Errors.RL_VARIABLE_BORROW_INDEX_OVERFLOW
);
reserve.variableBorrowIndex = uint128(newVariableBorrowIndex);
}
}
//solium-disable-next-line
reserve.lastUpdateTimestamp = uint40(block.timestamp);
return (newLiquidityIndex, newVariableBorrowIndex);
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {IERC20} from "../../../dependencies/openzeppelin/contracts/IERC20.sol";
import {ReserveLogic} from "./ReserveLogic.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../configuration/UserConfiguration.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import {IPriceOracleGetter} from "../../../interfaces/IPriceOracleGetter.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title GenericLogic library
* @author Aave
* @title Implements protocol-level logic to calculate and validate the state of a user
*/
library GenericLogic {
using ReserveLogic for DataTypes.ReserveData;
using SafeMath for uint256;
using WadRayMath for uint256;
using PercentageMath for uint256;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
using UserConfiguration for DataTypes.UserConfigurationMap;
uint256 public constant HEALTH_FACTOR_LIQUIDATION_THRESHOLD = 1 ether;
struct balanceDecreaseAllowedLocalVars {
uint256 decimals;
uint256 liquidationThreshold;
uint256 totalCollateralInETH;
uint256 totalDebtInETH;
uint256 avgLiquidationThreshold;
uint256 amountToDecreaseInETH;
uint256 collateralBalanceAfterDecrease;
uint256 liquidationThresholdAfterDecrease;
uint256 healthFactorAfterDecrease;
bool reserveUsageAsCollateralEnabled;
}
/**
* @dev Checks if a specific balance decrease is allowed
* (i.e. doesn't bring the user borrow position health factor under HEALTH_FACTOR_LIQUIDATION_THRESHOLD)
* @param asset The address of the underlying asset of the reserve
* @param user The address of the user
* @param amount The amount to decrease
* @param reservesData The data of all the reserves
* @param userConfig The user configuration
* @param reserves The list of all the active reserves
* @param oracle The address of the oracle contract
* @return true if the decrease of the balance is allowed
**/
function balanceDecreaseAllowed(
address asset,
address user,
uint256 amount,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap calldata userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
) external view returns (bool) {
if (
!userConfig.isBorrowingAny() ||
!userConfig.isUsingAsCollateral(reservesData[asset].id)
) {
return true;
}
balanceDecreaseAllowedLocalVars memory vars;
(, vars.liquidationThreshold, , vars.decimals, ) = reservesData[asset]
.configuration
.getParams();
if (vars.liquidationThreshold == 0) {
return true;
}
(
vars.totalCollateralInETH,
vars.totalDebtInETH,
,
vars.avgLiquidationThreshold,
) = calculateUserAccountData(
user,
reservesData,
userConfig,
reserves,
reservesCount,
oracle
);
if (vars.totalDebtInETH == 0) {
return true;
}
vars.amountToDecreaseInETH = IPriceOracleGetter(oracle)
.getAssetPrice(asset)
.mul(amount)
.div(10**vars.decimals);
vars.collateralBalanceAfterDecrease = vars.totalCollateralInETH.sub(
vars.amountToDecreaseInETH
);
//if there is a borrow, there can't be 0 collateral
if (vars.collateralBalanceAfterDecrease == 0) {
return false;
}
vars.liquidationThresholdAfterDecrease = vars
.totalCollateralInETH
.mul(vars.avgLiquidationThreshold)
.sub(vars.amountToDecreaseInETH.mul(vars.liquidationThreshold))
.div(vars.collateralBalanceAfterDecrease);
uint256 healthFactorAfterDecrease = calculateHealthFactorFromBalances(
vars.collateralBalanceAfterDecrease,
vars.totalDebtInETH,
vars.liquidationThresholdAfterDecrease
);
return
healthFactorAfterDecrease >=
GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD;
}
struct CalculateUserAccountDataVars {
uint256 reserveUnitPrice;
uint256 tokenUnit;
uint256 compoundedLiquidityBalance;
uint256 compoundedBorrowBalance;
uint256 decimals;
uint256 ltv;
uint256 liquidationThreshold;
uint256 i;
uint256 healthFactor;
uint256 totalCollateralInETH;
uint256 totalDebtInETH;
uint256 avgLtv;
uint256 avgLiquidationThreshold;
uint256 reservesLength;
bool healthFactorBelowThreshold;
address currentReserveAddress;
bool usageAsCollateralEnabled;
bool userUsesReserveAsCollateral;
}
/**
* @dev Calculates the user data across the reserves.
* this includes the total liquidity/collateral/borrow balances in ETH,
* the average Loan To Value, the average Liquidation Ratio, and the Health factor.
* @param user The address of the user
* @param reservesData Data of all the reserves
* @param userConfig The configuration of the user
* @param reserves The list of the available reserves
* @param oracle The price oracle address
* @return The total collateral and total debt of the user in ETH, the avg ltv, liquidation threshold and the HF
**/
function calculateUserAccountData(
address user,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap memory userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
)
internal
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256
)
{
CalculateUserAccountDataVars memory vars;
if (userConfig.isEmpty()) {
return (0, 0, 0, 0, uint256(-1));
}
for (vars.i = 0; vars.i < reservesCount; vars.i++) {
if (!userConfig.isUsingAsCollateralOrBorrowing(vars.i)) {
continue;
}
vars.currentReserveAddress = reserves[vars.i];
DataTypes.ReserveData storage currentReserve = reservesData[
vars.currentReserveAddress
];
(
vars.ltv,
vars.liquidationThreshold,
,
vars.decimals,
) = currentReserve.configuration.getParams();
vars.tokenUnit = 10**vars.decimals;
vars.reserveUnitPrice = IPriceOracleGetter(oracle).getAssetPrice(
vars.currentReserveAddress
);
if (
vars.liquidationThreshold != 0 &&
userConfig.isUsingAsCollateral(vars.i)
) {
vars.compoundedLiquidityBalance = IERC20(
currentReserve.aTokenAddress
).balanceOf(user);
uint256 liquidityBalanceETH = vars
.reserveUnitPrice
.mul(vars.compoundedLiquidityBalance)
.div(vars.tokenUnit);
vars.totalCollateralInETH = vars.totalCollateralInETH.add(
liquidityBalanceETH
);
vars.avgLtv = vars.avgLtv.add(
liquidityBalanceETH.mul(vars.ltv)
);
vars.avgLiquidationThreshold = vars.avgLiquidationThreshold.add(
liquidityBalanceETH.mul(vars.liquidationThreshold)
);
}
if (userConfig.isBorrowing(vars.i)) {
vars.compoundedBorrowBalance = IERC20(
currentReserve.stableDebtTokenAddress
).balanceOf(user);
vars.compoundedBorrowBalance = vars.compoundedBorrowBalance.add(
IERC20(currentReserve.variableDebtTokenAddress).balanceOf(
user
)
);
vars.totalDebtInETH = vars.totalDebtInETH.add(
vars.reserveUnitPrice.mul(vars.compoundedBorrowBalance).div(
vars.tokenUnit
)
);
}
}
vars.avgLtv = vars.totalCollateralInETH > 0
? vars.avgLtv.div(vars.totalCollateralInETH)
: 0;
vars.avgLiquidationThreshold = vars.totalCollateralInETH > 0
? vars.avgLiquidationThreshold.div(vars.totalCollateralInETH)
: 0;
vars.healthFactor = calculateHealthFactorFromBalances(
vars.totalCollateralInETH,
vars.totalDebtInETH,
vars.avgLiquidationThreshold
);
return (
vars.totalCollateralInETH,
vars.totalDebtInETH,
vars.avgLtv,
vars.avgLiquidationThreshold,
vars.healthFactor
);
}
/**
* @dev Calculates the health factor from the corresponding balances
* @param totalCollateralInETH The total collateral in ETH
* @param totalDebtInETH The total debt in ETH
* @param liquidationThreshold The avg liquidation threshold
* @return The health factor calculated from the balances provided
**/
function calculateHealthFactorFromBalances(
uint256 totalCollateralInETH,
uint256 totalDebtInETH,
uint256 liquidationThreshold
) internal pure returns (uint256) {
if (totalDebtInETH == 0) return uint256(-1);
return
(totalCollateralInETH.percentMul(liquidationThreshold)).wadDiv(
totalDebtInETH
);
}
/**
* @dev Calculates the equivalent amount in ETH that an user can borrow, depending on the available collateral and the
* average Loan To Value
* @param totalCollateralInETH The total collateral in ETH
* @param totalDebtInETH The total borrow balance
* @param ltv The average loan to value
* @return the amount available to borrow in ETH for the user
**/
function calculateAvailableBorrowsETH(
uint256 totalCollateralInETH,
uint256 totalDebtInETH,
uint256 ltv
) internal pure returns (uint256) {
uint256 availableBorrowsETH = totalCollateralInETH.percentMul(ltv);
if (availableBorrowsETH < totalDebtInETH) {
return 0;
}
availableBorrowsETH = availableBorrowsETH.sub(totalDebtInETH);
return availableBorrowsETH;
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {IERC20} from "../../../dependencies/openzeppelin/contracts/IERC20.sol";
import {ReserveLogic} from "./ReserveLogic.sol";
import {GenericLogic} from "./GenericLogic.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import {SafeERC20} from "../../../dependencies/openzeppelin/contracts/SafeERC20.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../configuration/UserConfiguration.sol";
import {Errors} from "../helpers/Errors.sol";
import {Helpers} from "../helpers/Helpers.sol";
import {IReserveInterestRateStrategy} from "../../../interfaces/IReserveInterestRateStrategy.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title ReserveLogic library
* @author Aave
* @notice Implements functions to validate the different actions of the protocol
*/
library ValidationLogic {
using ReserveLogic for DataTypes.ReserveData;
using SafeMath for uint256;
using WadRayMath for uint256;
using PercentageMath for uint256;
using SafeERC20 for IERC20;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
using UserConfiguration for DataTypes.UserConfigurationMap;
uint256 public constant REBALANCE_UP_LIQUIDITY_RATE_THRESHOLD = 4000;
uint256 public constant REBALANCE_UP_USAGE_RATIO_THRESHOLD = 0.95 * 1e27; //usage ratio of 95%
/**
* @dev Validates a deposit action
* @param reserve The reserve object on which the user is depositing
* @param amount The amount to be deposited
*/
function validateDeposit(
DataTypes.ReserveData storage reserve,
uint256 amount
) external view {
(bool isActive, bool isFrozen, , ) = reserve.configuration.getFlags();
require(amount != 0, Errors.VL_INVALID_AMOUNT);
require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
require(!isFrozen, Errors.VL_RESERVE_FROZEN);
}
/**
* @dev Validates a withdraw action
* @param reserveAddress The address of the reserve
* @param amount The amount to be withdrawn
* @param userBalance The balance of the user
* @param reservesData The reserves state
* @param userConfig The user configuration
* @param reserves The addresses of the reserves
* @param reservesCount The number of reserves
* @param oracle The price oracle
*/
function validateWithdraw(
address reserveAddress,
uint256 amount,
uint256 userBalance,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap storage userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
) external view {
require(amount != 0, Errors.VL_INVALID_AMOUNT);
require(
amount <= userBalance,
Errors.VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE
);
(bool isActive, , , ) = reservesData[reserveAddress]
.configuration
.getFlags();
require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
require(
GenericLogic.balanceDecreaseAllowed(
reserveAddress,
msg.sender,
amount,
reservesData,
userConfig,
reserves,
reservesCount,
oracle
),
Errors.VL_TRANSFER_NOT_ALLOWED
);
}
struct ValidateBorrowLocalVars {
uint256 currentLtv;
uint256 currentLiquidationThreshold;
uint256 amountOfCollateralNeededETH;
uint256 userCollateralBalanceETH;
uint256 userBorrowBalanceETH;
uint256 availableLiquidity;
uint256 healthFactor;
bool isActive;
bool isFrozen;
bool borrowingEnabled;
bool stableRateBorrowingEnabled;
}
/**
* @dev Validates a borrow action
* @param asset The address of the asset to borrow
* @param reserve The reserve state from which the user is borrowing
* @param userAddress The address of the user
* @param amount The amount to be borrowed
* @param amountInETH The amount to be borrowed, in ETH
* @param interestRateMode The interest rate mode at which the user is borrowing
* @param maxStableLoanPercent The max amount of the liquidity that can be borrowed at stable rate, in percentage
* @param reservesData The state of all the reserves
* @param userConfig The state of the user for the specific reserve
* @param reserves The addresses of all the active reserves
* @param oracle The price oracle
*/
function validateBorrow(
address asset,
DataTypes.ReserveData storage reserve,
address userAddress,
uint256 amount,
uint256 amountInETH,
uint256 interestRateMode,
uint256 maxStableLoanPercent,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap storage userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
) external view {
ValidateBorrowLocalVars memory vars;
(
vars.isActive,
vars.isFrozen,
vars.borrowingEnabled,
vars.stableRateBorrowingEnabled
) = reserve.configuration.getFlags();
require(vars.isActive, Errors.VL_NO_ACTIVE_RESERVE);
require(!vars.isFrozen, Errors.VL_RESERVE_FROZEN);
require(amount != 0, Errors.VL_INVALID_AMOUNT);
require(vars.borrowingEnabled, Errors.VL_BORROWING_NOT_ENABLED);
//validate interest rate mode
require(
uint256(DataTypes.InterestRateMode.VARIABLE) == interestRateMode ||
uint256(DataTypes.InterestRateMode.STABLE) == interestRateMode,
Errors.VL_INVALID_INTEREST_RATE_MODE_SELECTED
);
(
vars.userCollateralBalanceETH,
vars.userBorrowBalanceETH,
vars.currentLtv,
vars.currentLiquidationThreshold,
vars.healthFactor
) = GenericLogic.calculateUserAccountData(
userAddress,
reservesData,
userConfig,
reserves,
reservesCount,
oracle
);
require(
vars.userCollateralBalanceETH > 0,
Errors.VL_COLLATERAL_BALANCE_IS_0
);
require(
vars.healthFactor >
GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD,
Errors.VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD
);
//add the current already borrowed amount to the amount requested to calculate the total collateral needed.
vars.amountOfCollateralNeededETH = vars
.userBorrowBalanceETH
.add(amountInETH)
.percentDiv(vars.currentLtv); //LTV is calculated in percentage
require(
vars.amountOfCollateralNeededETH <= vars.userCollateralBalanceETH,
Errors.VL_COLLATERAL_CANNOT_COVER_NEW_BORROW
);
/**
* Following conditions need to be met if the user is borrowing at a stable rate:
* 1. Reserve must be enabled for stable rate borrowing
* 2. Users cannot borrow from the reserve if their collateral is (mostly) the same currency
* they are borrowing, to prevent abuses.
* 3. Users will be able to borrow only a portion of the total available liquidity
**/
if (interestRateMode == uint256(DataTypes.InterestRateMode.STABLE)) {
//check if the borrow mode is stable and if stable rate borrowing is enabled on this reserve
require(
vars.stableRateBorrowingEnabled,
Errors.VL_STABLE_BORROWING_NOT_ENABLED
);
require(
!userConfig.isUsingAsCollateral(reserve.id) ||
reserve.configuration.getLtv() == 0 ||
amount >
IERC20(reserve.aTokenAddress).balanceOf(userAddress),
Errors.VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY
);
vars.availableLiquidity = IERC20(asset).balanceOf(
reserve.aTokenAddress
);
//calculate the max available loan size in stable rate mode as a percentage of the
//available liquidity
uint256 maxLoanSizeStable = vars.availableLiquidity.percentMul(
maxStableLoanPercent
);
require(
amount <= maxLoanSizeStable,
Errors.VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE
);
}
}
/**
* @dev Validates a repay action
* @param reserve The reserve state from which the user is repaying
* @param amountSent The amount sent for the repayment. Can be an actual value or uint(-1)
* @param onBehalfOf The address of the user msg.sender is repaying for
* @param stableDebt The borrow balance of the user
* @param variableDebt The borrow balance of the user
*/
function validateRepay(
DataTypes.ReserveData storage reserve,
uint256 amountSent,
DataTypes.InterestRateMode rateMode,
address onBehalfOf,
uint256 stableDebt,
uint256 variableDebt
) external view {
bool isActive = reserve.configuration.getActive();
require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
require(amountSent > 0, Errors.VL_INVALID_AMOUNT);
require(
(stableDebt > 0 &&
DataTypes.InterestRateMode(rateMode) ==
DataTypes.InterestRateMode.STABLE) ||
(variableDebt > 0 &&
DataTypes.InterestRateMode(rateMode) ==
DataTypes.InterestRateMode.VARIABLE),
Errors.VL_NO_DEBT_OF_SELECTED_TYPE
);
require(
amountSent != uint256(-1) || msg.sender == onBehalfOf,
Errors.VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF
);
}
/**
* @dev Validates a swap of borrow rate mode.
* @param reserve The reserve state on which the user is swapping the rate
* @param userConfig The user reserves configuration
* @param stableDebt The stable debt of the user
* @param variableDebt The variable debt of the user
* @param currentRateMode The rate mode of the borrow
*/
function validateSwapRateMode(
DataTypes.ReserveData storage reserve,
DataTypes.UserConfigurationMap storage userConfig,
uint256 stableDebt,
uint256 variableDebt,
DataTypes.InterestRateMode currentRateMode
) external view {
(bool isActive, bool isFrozen, , bool stableRateEnabled) = reserve
.configuration
.getFlags();
require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
require(!isFrozen, Errors.VL_RESERVE_FROZEN);
if (currentRateMode == DataTypes.InterestRateMode.STABLE) {
require(stableDebt > 0, Errors.VL_NO_STABLE_RATE_LOAN_IN_RESERVE);
} else if (currentRateMode == DataTypes.InterestRateMode.VARIABLE) {
require(
variableDebt > 0,
Errors.VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE
);
/**
* user wants to swap to stable, before swapping we need to ensure that
* 1. stable borrow rate is enabled on the reserve
* 2. user is not trying to abuse the reserve by depositing
* more collateral than he is borrowing, artificially lowering
* the interest rate, borrowing at variable, and switching to stable
**/
require(stableRateEnabled, Errors.VL_STABLE_BORROWING_NOT_ENABLED);
require(
!userConfig.isUsingAsCollateral(reserve.id) ||
reserve.configuration.getLtv() == 0 ||
stableDebt.add(variableDebt) >
IERC20(reserve.aTokenAddress).balanceOf(msg.sender),
Errors.VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY
);
} else {
revert(Errors.VL_INVALID_INTEREST_RATE_MODE_SELECTED);
}
}
/**
* @dev Validates a stable borrow rate rebalance action
* @param reserve The reserve state on which the user is getting rebalanced
* @param reserveAddress The address of the reserve
* @param stableDebtToken The stable debt token instance
* @param variableDebtToken The variable debt token instance
* @param aTokenAddress The address of the aToken contract
*/
function validateRebalanceStableBorrowRate(
DataTypes.ReserveData storage reserve,
address reserveAddress,
IERC20 stableDebtToken,
IERC20 variableDebtToken,
address aTokenAddress
) external view {
(bool isActive, , , ) = reserve.configuration.getFlags();
require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
//if the usage ratio is below 95%, no rebalances are needed
uint256 totalDebt = stableDebtToken
.totalSupply()
.add(variableDebtToken.totalSupply())
.wadToRay();
uint256 availableLiquidity = IERC20(reserveAddress)
.balanceOf(aTokenAddress)
.wadToRay();
uint256 usageRatio = totalDebt == 0
? 0
: totalDebt.rayDiv(availableLiquidity.add(totalDebt));
//if the liquidity rate is below REBALANCE_UP_THRESHOLD of the max variable APR at 95% usage,
//then we allow rebalancing of the stable rate positions.
uint256 currentLiquidityRate = reserve.currentLiquidityRate;
uint256 maxVariableBorrowRate = IReserveInterestRateStrategy(
reserve.interestRateStrategyAddress
).getMaxVariableBorrowRate();
require(
usageRatio >= REBALANCE_UP_USAGE_RATIO_THRESHOLD &&
currentLiquidityRate <=
maxVariableBorrowRate.percentMul(
REBALANCE_UP_LIQUIDITY_RATE_THRESHOLD
),
Errors.LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET
);
}
/**
* @dev Validates the action of setting an asset as collateral
* @param reserve The state of the reserve that the user is enabling or disabling as collateral
* @param reserveAddress The address of the reserve
* @param reservesData The data of all the reserves
* @param userConfig The state of the user for the specific reserve
* @param reserves The addresses of all the active reserves
* @param oracle The price oracle
*/
function validateSetUseReserveAsCollateral(
DataTypes.ReserveData storage reserve,
address reserveAddress,
bool useAsCollateral,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap storage userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
) external view {
uint256 underlyingBalance = IERC20(reserve.aTokenAddress).balanceOf(
msg.sender
);
require(
underlyingBalance > 0,
Errors.VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0
);
require(
useAsCollateral ||
GenericLogic.balanceDecreaseAllowed(
reserveAddress,
msg.sender,
underlyingBalance,
reservesData,
userConfig,
reserves,
reservesCount,
oracle
),
Errors.VL_DEPOSIT_ALREADY_IN_USE
);
}
/**
* @dev Validates a flashloan action
* @param assets The assets being flashborrowed
* @param amounts The amounts for each asset being borrowed
**/
function validateFlashloan(
address[] memory assets,
uint256[] memory amounts
) internal pure {
require(
assets.length == amounts.length,
Errors.VL_INCONSISTENT_FLASHLOAN_PARAMS
);
}
/**
* @dev Validates the liquidation action
* @param collateralReserve The reserve data of the collateral
* @param principalReserve The reserve data of the principal
* @param userConfig The user configuration
* @param userHealthFactor The user's health factor
* @param userStableDebt Total stable debt balance of the user
* @param userVariableDebt Total variable debt balance of the user
**/
function validateLiquidationCall(
DataTypes.ReserveData storage collateralReserve,
DataTypes.ReserveData storage principalReserve,
DataTypes.UserConfigurationMap storage userConfig,
uint256 userHealthFactor,
uint256 userStableDebt,
uint256 userVariableDebt
) internal view returns (uint256, string memory) {
if (
!collateralReserve.configuration.getActive() ||
!principalReserve.configuration.getActive()
) {
return (
uint256(Errors.CollateralManagerErrors.NO_ACTIVE_RESERVE),
Errors.VL_NO_ACTIVE_RESERVE
);
}
if (
userHealthFactor >= GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD
) {
return (
uint256(
Errors.CollateralManagerErrors.HEALTH_FACTOR_ABOVE_THRESHOLD
),
Errors.LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD
);
}
bool isCollateralEnabled = collateralReserve
.configuration
.getLiquidationThreshold() >
0 &&
userConfig.isUsingAsCollateral(collateralReserve.id);
//if collateral isn't enabled as collateral by user, it cannot be liquidated
if (!isCollateralEnabled) {
return (
uint256(
Errors
.CollateralManagerErrors
.COLLATERAL_CANNOT_BE_LIQUIDATED
),
Errors.LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED
);
}
if (userStableDebt == 0 && userVariableDebt == 0) {
return (
uint256(Errors.CollateralManagerErrors.CURRRENCY_NOT_BORROWED),
Errors.LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER
);
}
return (
uint256(Errors.CollateralManagerErrors.NO_ERROR),
Errors.LPCM_NO_ERRORS
);
}
/**
* @dev Validates an aToken transfer
* @param from The user from which the aTokens are being transferred
* @param reservesData The state of all the reserves
* @param userConfig The state of the user for the specific reserve
* @param reserves The addresses of all the active reserves
* @param oracle The price oracle
*/
function validateTransfer(
address from,
mapping(address => DataTypes.ReserveData) storage reservesData,
DataTypes.UserConfigurationMap storage userConfig,
mapping(uint256 => address) storage reserves,
uint256 reservesCount,
address oracle
) internal view {
(, , , , uint256 healthFactor) = GenericLogic.calculateUserAccountData(
from,
reservesData,
userConfig,
reserves,
reservesCount,
oracle
);
require(
healthFactor >= GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD,
Errors.VL_TRANSFER_NOT_ALLOWED
);
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title ReserveConfiguration library
* @author Aave
* @notice Implements the bitmap logic to handle the reserve configuration
*/
library ReserveConfiguration {
uint256 constant LTV_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000; // prettier-ignore
uint256 constant LIQUIDATION_THRESHOLD_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFF; // prettier-ignore
uint256 constant LIQUIDATION_BONUS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFF; // prettier-ignore
uint256 constant DECIMALS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00FFFFFFFFFFFF; // prettier-ignore
uint256 constant ACTIVE_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant FROZEN_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFF; // prettier-ignore
uint256 constant STABLE_BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFFFFFFFFF; // prettier-ignore
uint256 constant RESERVE_FACTOR_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFFFFFFFFFF; // prettier-ignore
/// @dev For the LTV, the start bit is 0 (up to 15), hence no bitshifting is needed
uint256 constant LIQUIDATION_THRESHOLD_START_BIT_POSITION = 16;
uint256 constant LIQUIDATION_BONUS_START_BIT_POSITION = 32;
uint256 constant RESERVE_DECIMALS_START_BIT_POSITION = 48;
uint256 constant IS_ACTIVE_START_BIT_POSITION = 56;
uint256 constant IS_FROZEN_START_BIT_POSITION = 57;
uint256 constant BORROWING_ENABLED_START_BIT_POSITION = 58;
uint256 constant STABLE_BORROWING_ENABLED_START_BIT_POSITION = 59;
uint256 constant RESERVE_FACTOR_START_BIT_POSITION = 64;
uint256 constant MAX_VALID_LTV = 65535;
uint256 constant MAX_VALID_LIQUIDATION_THRESHOLD = 65535;
uint256 constant MAX_VALID_LIQUIDATION_BONUS = 65535;
uint256 constant MAX_VALID_DECIMALS = 255;
uint256 constant MAX_VALID_RESERVE_FACTOR = 65535;
/**
* @dev Sets the Loan to Value of the reserve
* @param self The reserve configuration
* @param ltv the new ltv
**/
function setLtv(DataTypes.ReserveConfigurationMap memory self, uint256 ltv)
internal
pure
{
require(ltv <= MAX_VALID_LTV, Errors.RC_INVALID_LTV);
self.data = (self.data & LTV_MASK) | ltv;
}
/**
* @dev Gets the Loan to Value of the reserve
* @param self The reserve configuration
* @return The loan to value
**/
function getLtv(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return self.data & ~LTV_MASK;
}
/**
* @dev Sets the liquidation threshold of the reserve
* @param self The reserve configuration
* @param threshold The new liquidation threshold
**/
function setLiquidationThreshold(
DataTypes.ReserveConfigurationMap memory self,
uint256 threshold
) internal pure {
require(
threshold <= MAX_VALID_LIQUIDATION_THRESHOLD,
Errors.RC_INVALID_LIQ_THRESHOLD
);
self.data =
(self.data & LIQUIDATION_THRESHOLD_MASK) |
(threshold << LIQUIDATION_THRESHOLD_START_BIT_POSITION);
}
/**
* @dev Gets the liquidation threshold of the reserve
* @param self The reserve configuration
* @return The liquidation threshold
**/
function getLiquidationThreshold(
DataTypes.ReserveConfigurationMap storage self
) internal view returns (uint256) {
return
(self.data & ~LIQUIDATION_THRESHOLD_MASK) >>
LIQUIDATION_THRESHOLD_START_BIT_POSITION;
}
/**
* @dev Sets the liquidation bonus of the reserve
* @param self The reserve configuration
* @param bonus The new liquidation bonus
**/
function setLiquidationBonus(
DataTypes.ReserveConfigurationMap memory self,
uint256 bonus
) internal pure {
require(
bonus <= MAX_VALID_LIQUIDATION_BONUS,
Errors.RC_INVALID_LIQ_BONUS
);
self.data =
(self.data & LIQUIDATION_BONUS_MASK) |
(bonus << LIQUIDATION_BONUS_START_BIT_POSITION);
}
/**
* @dev Gets the liquidation bonus of the reserve
* @param self The reserve configuration
* @return The liquidation bonus
**/
function getLiquidationBonus(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return
(self.data & ~LIQUIDATION_BONUS_MASK) >>
LIQUIDATION_BONUS_START_BIT_POSITION;
}
/**
* @dev Sets the decimals of the underlying asset of the reserve
* @param self The reserve configuration
* @param decimals The decimals
**/
function setDecimals(
DataTypes.ReserveConfigurationMap memory self,
uint256 decimals
) internal pure {
require(decimals <= MAX_VALID_DECIMALS, Errors.RC_INVALID_DECIMALS);
self.data =
(self.data & DECIMALS_MASK) |
(decimals << RESERVE_DECIMALS_START_BIT_POSITION);
}
/**
* @dev Gets the decimals of the underlying asset of the reserve
* @param self The reserve configuration
* @return The decimals of the asset
**/
function getDecimals(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return
(self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION;
}
/**
* @dev Sets the active state of the reserve
* @param self The reserve configuration
* @param active The active state
**/
function setActive(
DataTypes.ReserveConfigurationMap memory self,
bool active
) internal pure {
self.data =
(self.data & ACTIVE_MASK) |
(uint256(active ? 1 : 0) << IS_ACTIVE_START_BIT_POSITION);
}
/**
* @dev Gets the active state of the reserve
* @param self The reserve configuration
* @return The active state
**/
function getActive(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (bool)
{
return (self.data & ~ACTIVE_MASK) != 0;
}
/**
* @dev Sets the frozen state of the reserve
* @param self The reserve configuration
* @param frozen The frozen state
**/
function setFrozen(
DataTypes.ReserveConfigurationMap memory self,
bool frozen
) internal pure {
self.data =
(self.data & FROZEN_MASK) |
(uint256(frozen ? 1 : 0) << IS_FROZEN_START_BIT_POSITION);
}
/**
* @dev Gets the frozen state of the reserve
* @param self The reserve configuration
* @return The frozen state
**/
function getFrozen(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (bool)
{
return (self.data & ~FROZEN_MASK) != 0;
}
/**
* @dev Enables or disables borrowing on the reserve
* @param self The reserve configuration
* @param enabled True if the borrowing needs to be enabled, false otherwise
**/
function setBorrowingEnabled(
DataTypes.ReserveConfigurationMap memory self,
bool enabled
) internal pure {
self.data =
(self.data & BORROWING_MASK) |
(uint256(enabled ? 1 : 0) << BORROWING_ENABLED_START_BIT_POSITION);
}
/**
* @dev Gets the borrowing state of the reserve
* @param self The reserve configuration
* @return The borrowing state
**/
function getBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (bool)
{
return (self.data & ~BORROWING_MASK) != 0;
}
/**
* @dev Enables or disables stable rate borrowing on the reserve
* @param self The reserve configuration
* @param enabled True if the stable rate borrowing needs to be enabled, false otherwise
**/
function setStableRateBorrowingEnabled(
DataTypes.ReserveConfigurationMap memory self,
bool enabled
) internal pure {
self.data =
(self.data & STABLE_BORROWING_MASK) |
(uint256(enabled ? 1 : 0) <<
STABLE_BORROWING_ENABLED_START_BIT_POSITION);
}
/**
* @dev Gets the stable rate borrowing state of the reserve
* @param self The reserve configuration
* @return The stable rate borrowing state
**/
function getStableRateBorrowingEnabled(
DataTypes.ReserveConfigurationMap storage self
) internal view returns (bool) {
return (self.data & ~STABLE_BORROWING_MASK) != 0;
}
/**
* @dev Sets the reserve factor of the reserve
* @param self The reserve configuration
* @param reserveFactor The reserve factor
**/
function setReserveFactor(
DataTypes.ReserveConfigurationMap memory self,
uint256 reserveFactor
) internal pure {
require(
reserveFactor <= MAX_VALID_RESERVE_FACTOR,
Errors.RC_INVALID_RESERVE_FACTOR
);
self.data =
(self.data & RESERVE_FACTOR_MASK) |
(reserveFactor << RESERVE_FACTOR_START_BIT_POSITION);
}
/**
* @dev Gets the reserve factor of the reserve
* @param self The reserve configuration
* @return The reserve factor
**/
function getReserveFactor(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (uint256)
{
return
(self.data & ~RESERVE_FACTOR_MASK) >>
RESERVE_FACTOR_START_BIT_POSITION;
}
/**
* @dev Gets the configuration flags of the reserve
* @param self The reserve configuration
* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
**/
function getFlags(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (
bool,
bool,
bool,
bool
)
{
uint256 dataLocal = self.data;
return (
(dataLocal & ~ACTIVE_MASK) != 0,
(dataLocal & ~FROZEN_MASK) != 0,
(dataLocal & ~BORROWING_MASK) != 0,
(dataLocal & ~STABLE_BORROWING_MASK) != 0
);
}
/**
* @dev Gets the configuration paramters of the reserve
* @param self The reserve configuration
* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
**/
function getParams(DataTypes.ReserveConfigurationMap storage self)
internal
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256
)
{
uint256 dataLocal = self.data;
return (
dataLocal & ~LTV_MASK,
(dataLocal & ~LIQUIDATION_THRESHOLD_MASK) >>
LIQUIDATION_THRESHOLD_START_BIT_POSITION,
(dataLocal & ~LIQUIDATION_BONUS_MASK) >>
LIQUIDATION_BONUS_START_BIT_POSITION,
(dataLocal & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
(dataLocal & ~RESERVE_FACTOR_MASK) >>
RESERVE_FACTOR_START_BIT_POSITION
);
}
/**
* @dev Gets the configuration paramters of the reserve from a memory object
* @param self The reserve configuration
* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
**/
function getParamsMemory(DataTypes.ReserveConfigurationMap memory self)
internal
pure
returns (
uint256,
uint256,
uint256,
uint256,
uint256
)
{
return (
self.data & ~LTV_MASK,
(self.data & ~LIQUIDATION_THRESHOLD_MASK) >>
LIQUIDATION_THRESHOLD_START_BIT_POSITION,
(self.data & ~LIQUIDATION_BONUS_MASK) >>
LIQUIDATION_BONUS_START_BIT_POSITION,
(self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
(self.data & ~RESERVE_FACTOR_MASK) >>
RESERVE_FACTOR_START_BIT_POSITION
);
}
/**
* @dev Gets the configuration flags of the reserve from a memory object
* @param self The reserve configuration
* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
**/
function getFlagsMemory(DataTypes.ReserveConfigurationMap memory self)
internal
pure
returns (
bool,
bool,
bool,
bool
)
{
return (
(self.data & ~ACTIVE_MASK) != 0,
(self.data & ~FROZEN_MASK) != 0,
(self.data & ~BORROWING_MASK) != 0,
(self.data & ~STABLE_BORROWING_MASK) != 0
);
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";
/**
* @title UserConfiguration library
* @author Aave
* @notice Implements the bitmap logic to handle the user configuration
*/
library UserConfiguration {
uint256 internal constant BORROWING_MASK =
0x5555555555555555555555555555555555555555555555555555555555555555;
/**
* @dev Sets if the user is borrowing the reserve identified by reserveIndex
* @param self The configuration object
* @param reserveIndex The index of the reserve in the bitmap
* @param borrowing True if the user is borrowing the reserve, false otherwise
**/
function setBorrowing(
DataTypes.UserConfigurationMap storage self,
uint256 reserveIndex,
bool borrowing
) internal {
require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
self.data =
(self.data & ~(1 << (reserveIndex * 2))) |
(uint256(borrowing ? 1 : 0) << (reserveIndex * 2));
}
/**
* @dev Sets if the user is using as collateral the reserve identified by reserveIndex
* @param self The configuration object
* @param reserveIndex The index of the reserve in the bitmap
* @param usingAsCollateral True if the user is usin the reserve as collateral, false otherwise
**/
function setUsingAsCollateral(
DataTypes.UserConfigurationMap storage self,
uint256 reserveIndex,
bool usingAsCollateral
) internal {
require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
self.data =
(self.data & ~(1 << (reserveIndex * 2 + 1))) |
(uint256(usingAsCollateral ? 1 : 0) << (reserveIndex * 2 + 1));
}
/**
* @dev Used to validate if a user has been using the reserve for borrowing or as collateral
* @param self The configuration object
* @param reserveIndex The index of the reserve in the bitmap
* @return True if the user has been using a reserve for borrowing or as collateral, false otherwise
**/
function isUsingAsCollateralOrBorrowing(
DataTypes.UserConfigurationMap memory self,
uint256 reserveIndex
) internal pure returns (bool) {
require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
return (self.data >> (reserveIndex * 2)) & 3 != 0;
}
/**
* @dev Used to validate if a user has been using the reserve for borrowing
* @param self The configuration object
* @param reserveIndex The index of the reserve in the bitmap
* @return True if the user has been using a reserve for borrowing, false otherwise
**/
function isBorrowing(
DataTypes.UserConfigurationMap memory self,
uint256 reserveIndex
) internal pure returns (bool) {
require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
return (self.data >> (reserveIndex * 2)) & 1 != 0;
}
/**
* @dev Used to validate if a user has been using the reserve as collateral
* @param self The configuration object
* @param reserveIndex The index of the reserve in the bitmap
* @return True if the user has been using a reserve as collateral, false otherwise
**/
function isUsingAsCollateral(
DataTypes.UserConfigurationMap memory self,
uint256 reserveIndex
) internal pure returns (bool) {
require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
return (self.data >> (reserveIndex * 2 + 1)) & 1 != 0;
}
/**
* @dev Used to validate if a user has been borrowing from any reserve
* @param self The configuration object
* @return True if the user has been borrowing any reserve, false otherwise
**/
function isBorrowingAny(DataTypes.UserConfigurationMap memory self)
internal
pure
returns (bool)
{
return self.data & BORROWING_MASK != 0;
}
/**
* @dev Used to validate if a user has not been using any reserve
* @param self The configuration object
* @return True if the user has been borrowing any reserve, false otherwise
**/
function isEmpty(DataTypes.UserConfigurationMap memory self)
internal
pure
returns (bool)
{
return self.data == 0;
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
library DataTypes {
// refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties.
struct ReserveData {
//stores the reserve configuration
ReserveConfigurationMap configuration;
//the liquidity index. Expressed in ray
uint128 liquidityIndex;
//variable borrow index. Expressed in ray
uint128 variableBorrowIndex;
//the current supply rate. Expressed in ray
uint128 currentLiquidityRate;
//the current variable borrow rate. Expressed in ray
uint128 currentVariableBorrowRate;
//the current stable borrow rate. Expressed in ray
uint128 currentStableBorrowRate;
uint40 lastUpdateTimestamp;
//tokens addresses
address aTokenAddress;
address stableDebtTokenAddress;
address variableDebtTokenAddress;
//address of the interest rate strategy
address interestRateStrategyAddress;
//the id of the reserve. Represents the position in the list of the active reserves
uint8 id;
}
struct ReserveConfigurationMap {
//bit 0-15: LTV
//bit 16-31: Liq. threshold
//bit 32-47: Liq. bonus
//bit 48-55: Decimals
//bit 56: Reserve is active
//bit 57: reserve is frozen
//bit 58: borrowing is enabled
//bit 59: stable rate borrowing enabled
//bit 60-63: reserved
//bit 64-79: reserve factor
uint256 data;
}
struct UserConfigurationMap {
uint256 data;
}
enum InterestRateMode {
NONE,
STABLE,
VARIABLE
}
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {UserConfiguration} from "../libraries/configuration/UserConfiguration.sol";
import {ReserveConfiguration} from "../libraries/configuration/ReserveConfiguration.sol";
import {ReserveLogic} from "../libraries/logic/ReserveLogic.sol";
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";
contract LendingPoolStorage {
using ReserveLogic for DataTypes.ReserveData;
using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
using UserConfiguration for DataTypes.UserConfigurationMap;
ILendingPoolAddressesProvider internal _addressesProvider;
mapping(address => DataTypes.ReserveData) internal _reserves;
mapping(address => DataTypes.UserConfigurationMap) internal _usersConfig;
// the list of the available reserves, structured as a mapping for gas savings reasons
mapping(uint256 => address) internal _reservesList;
uint256 internal _reservesCount;
bool internal _paused;
uint256 internal _maxStableRateBorrowSizePercent;
uint256 internal _flashLoanPremiumTotal;
uint256 internal _maxNumberOfReserves;
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
interface IScaledBalanceToken {
/**
* @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
* updated stored balance divided by the reserve's liquidity index at the moment of the update
* @param user The user whose balance is calculated
* @return The scaled balance of the user
**/
function scaledBalanceOf(address user) external view returns (uint256);
/**
* @dev Returns the scaled balance of the user and the scaled total supply.
* @param user The address of the user
* @return The scaled balance of the user
* @return The scaled balance and the scaled total supply
**/
function getScaledUserBalanceAndSupply(address user)
external
view
returns (uint256, uint256);
/**
* @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index)
* @return The scaled total supply
**/
function scaledTotalSupply() external view returns (uint256);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {ILendingPool} from "./ILendingPool.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";
/**
* @title IInitializableAToken
* @notice Interface for the initialize function on AToken
* @author Aave
**/
interface IInitializableAToken {
/**
* @dev Emitted when an aToken is initialized
* @param underlyingAsset The address of the underlying asset
* @param pool The address of the associated lending pool
* @param treasury The address of the treasury
* @param incentivesController The address of the incentives controller for this aToken
* @param aTokenDecimals the decimals of the underlying
* @param aTokenName the name of the aToken
* @param aTokenSymbol the symbol of the aToken
* @param params A set of encoded parameters for additional initialization
**/
event Initialized(
address indexed underlyingAsset,
address indexed pool,
address treasury,
address incentivesController,
uint8 aTokenDecimals,
string aTokenName,
string aTokenSymbol,
bytes params
);
/**
* @dev Initializes the aToken
* @param pool The address of the lending pool where this aToken will be used
* @param treasury The address of the Aave treasury, receiving the fees on this aToken
* @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
* @param incentivesController The smart contract managing potential incentives distribution
* @param aTokenDecimals The decimals of the aToken, same as the underlying asset's
* @param aTokenName The name of the aToken
* @param aTokenSymbol The symbol of the aToken
*/
function initialize(
ILendingPool pool,
address treasury,
address underlyingAsset,
IAaveIncentivesController incentivesController,
uint8 aTokenDecimals,
string calldata aTokenName,
string calldata aTokenSymbol,
bytes calldata params
) external;
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
interface IAaveIncentivesController {
event RewardsAccrued(address indexed user, uint256 amount);
event RewardsClaimed(
address indexed user,
address indexed to,
uint256 amount
);
event RewardsClaimed(
address indexed user,
address indexed to,
address indexed claimer,
uint256 amount
);
event ClaimerSet(address indexed user, address indexed claimer);
/*
* @dev Returns the configuration of the distribution for a certain asset
* @param asset The address of the reference asset of the distribution
* @return The asset index, the emission per second and the last updated timestamp
**/
function getAssetData(address asset)
external
view
returns (
uint256,
uint256,
uint256
);
/**
* @dev Whitelists an address to claim the rewards on behalf of another address
* @param user The address of the user
* @param claimer The address of the claimer
*/
function setClaimer(address user, address claimer) external;
/**
* @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
* @param user The address of the user
* @return The claimer address
*/
function getClaimer(address user) external view returns (address);
/**
* @dev Configure assets for a certain rewards emission
* @param assets The assets to incentivize
* @param emissionsPerSecond The emission for each asset
*/
function configureAssets(
address[] calldata assets,
uint256[] calldata emissionsPerSecond
) external;
/**
* @dev Called by the corresponding asset on any update that affects the rewards distribution
* @param user The address of the user
* @param userBalance The balance of the user of the asset in the lending pool
* @param totalSupply The total supply of the asset in the lending pool
**/
function handleAction(
address user,
uint256 userBalance,
uint256 totalSupply
) external;
/**
* @dev Returns the total of rewards of an user, already accrued + not yet accrued
* @param user The address of the user
* @return The rewards
**/
function getRewardsBalance(address[] calldata assets, address user)
external
view
returns (uint256);
/**
* @dev Claims reward for an user, on all the assets of the lending pool, accumulating the pending rewards
* @param amount Amount of rewards to claim
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewards(
address[] calldata assets,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Claims reward for an user on behalf, on all the assets of the lending pool, accumulating the pending rewards. The caller must
* be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
* @param amount Amount of rewards to claim
* @param user Address to check and claim rewards
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewardsOnBehalf(
address[] calldata assets,
uint256 amount,
address user,
address to
) external returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @return the unclaimed user rewards
*/
function getUserUnclaimedRewards(address user)
external
view
returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @param asset The asset to incentivize
* @return the user index for the asset
*/
function getUserAssetData(address user, address asset)
external
view
returns (uint256);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function REWARD_TOKEN() external view returns (address);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function PRECISION() external view returns (uint8);
/**
* @dev Gets the distribution end timestamp of the emissions
*/
function DISTRIBUTION_END() external view returns (uint256);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {ILendingPool} from "./ILendingPool.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";
/**
* @title IInitializableDebtToken
* @notice Interface for the initialize function common between debt tokens
* @author Aave
**/
interface IInitializableDebtToken {
/**
* @dev Emitted when a debt token is initialized
* @param underlyingAsset The address of the underlying asset
* @param pool The address of the associated lending pool
* @param incentivesController The address of the incentives controller for this aToken
* @param debtTokenDecimals the decimals of the debt token
* @param debtTokenName the name of the debt token
* @param debtTokenSymbol the symbol of the debt token
* @param params A set of encoded parameters for additional initialization
**/
event Initialized(
address indexed underlyingAsset,
address indexed pool,
address incentivesController,
uint8 debtTokenDecimals,
string debtTokenName,
string debtTokenSymbol,
bytes params
);
/**
* @dev Initializes the debt token.
* @param pool The address of the lending pool where this aToken will be used
* @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
* @param incentivesController The smart contract managing potential incentives distribution
* @param debtTokenDecimals The decimals of the debtToken, same as the underlying asset's
* @param debtTokenName The name of the token
* @param debtTokenSymbol The symbol of the token
*/
function initialize(
ILendingPool pool,
address underlyingAsset,
IAaveIncentivesController incentivesController,
uint8 debtTokenDecimals,
string memory debtTokenName,
string memory debtTokenSymbol,
bytes calldata params
) external;
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
/**
* @title IReserveInterestRateStrategyInterface interface
* @dev Interface for the calculation of the interest rates
* @author Aave
*/
interface IReserveInterestRateStrategy {
function baseVariableBorrowRate() external view returns (uint256);
function getMaxVariableBorrowRate() external view returns (uint256);
function calculateInterestRates(
address reserve,
uint256 availableLiquidity,
uint256 totalStableDebt,
uint256 totalVariableDebt,
uint256 averageStableBorrowRate,
uint256 reserveFactor
)
external
view
returns (
uint256,
uint256,
uint256
);
function calculateInterestRates(
address reserve,
address aToken,
uint256 liquidityAdded,
uint256 liquidityTaken,
uint256 totalStableDebt,
uint256 totalVariableDebt,
uint256 averageStableBorrowRate,
uint256 reserveFactor
)
external
view
returns (
uint256 liquidityRate,
uint256 stableBorrowRate,
uint256 variableBorrowRate
);
}// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {WadRayMath} from "./WadRayMath.sol";
library MathUtils {
using SafeMath for uint256;
using WadRayMath for uint256;
/// @dev Ignoring leap years
uint256 internal constant SECONDS_PER_YEAR = 365 days;
/**
* @dev Function to calculate the interest accumulated using a linear interest rate formula
* @param rate The interest rate, in ray
* @param lastUpdateTimestamp The timestamp of the last update of the interest
* @return The interest rate linearly accumulated during the timeDelta, in ray
**/
function calculateLinearInterest(uint256 rate, uint40 lastUpdateTimestamp)
internal
view
returns (uint256)
{
//solium-disable-next-line
uint256 timeDifference = block.timestamp.sub(
uint256(lastUpdateTimestamp)
);
return
(rate.mul(timeDifference) / SECONDS_PER_YEAR).add(WadRayMath.ray());
}
/**
* @dev Function to calculate the interest using a compounded interest rate formula
* To avoid expensive exponentiation, the calculation is performed using a binomial approximation:
*
* (1+x)^n = 1+n*x+[n/2*(n-1)]*x^2+[n/6*(n-1)*(n-2)*x^3...
*
* The approximation slightly underpays liquidity providers and undercharges borrowers, with the advantage of great gas cost reductions
* The whitepaper contains reference to the approximation and a table showing the margin of error per different time periods
*
* @param rate The interest rate, in ray
* @param lastUpdateTimestamp The timestamp of the last update of the interest
* @return The interest rate compounded during the timeDelta, in ray
**/
function calculateCompoundedInterest(
uint256 rate,
uint40 lastUpdateTimestamp,
uint256 currentTimestamp
) internal pure returns (uint256) {
//solium-disable-next-line
uint256 exp = currentTimestamp.sub(uint256(lastUpdateTimestamp));
if (exp == 0) {
return WadRayMath.ray();
}
uint256 expMinusOne = exp - 1;
uint256 expMinusTwo = exp > 2 ? exp - 2 : 0;
uint256 ratePerSecond = rate / SECONDS_PER_YEAR;
uint256 basePowerTwo = ratePerSecond.rayMul(ratePerSecond);
uint256 basePowerThree = basePowerTwo.rayMul(ratePerSecond);
uint256 secondTerm = exp.mul(expMinusOne).mul(basePowerTwo) / 2;
uint256 thirdTerm = exp.mul(expMinusOne).mul(expMinusTwo).mul(
basePowerThree
) / 6;
return
WadRayMath.ray().add(ratePerSecond.mul(exp)).add(secondTerm).add(
thirdTerm
);
}
/**
* @dev Calculates the compounded interest between the timestamp of the last update and the current block timestamp
* @param rate The interest rate (in ray)
* @param lastUpdateTimestamp The timestamp from which the interest accumulation needs to be calculated
**/
function calculateCompoundedInterest(
uint256 rate,
uint40 lastUpdateTimestamp
) internal view returns (uint256) {
return
calculateCompoundedInterest(
rate,
lastUpdateTimestamp,
block.timestamp
);
}
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {
"contracts/protocol/libraries/logic/ReserveLogic.sol": {
"ReserveLogic": "0xf0bd07a20f8980c6853b06c59a68bc2bd72b2e3a"
},
"contracts/protocol/libraries/logic/ValidationLogic.sol": {
"ValidationLogic": "0x314220ca3974751a26436f454c55453d4b997f12"
}
}
}Contract Security Audit
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Contract ABI
API[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"onBehalfOf","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"borrowRateMode","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"borrowRate","type":"uint256"},{"indexed":true,"internalType":"uint16","name":"referral","type":"uint16"}],"name":"Borrow","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"onBehalfOf","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"uint16","name":"referral","type":"uint16"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":true,"internalType":"address","name":"initiator","type":"address"},{"indexed":true,"internalType":"address","name":"asset","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"premium","type":"uint256"},{"indexed":false,"internalType":"uint16","name":"referralCode","type":"uint16"}],"name":"FlashLoan","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"collateralAsset","type":"address"},{"indexed":true,"internalType":"address","name":"debtAsset","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"debtToCover","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"liquidatedCollateralAmount","type":"uint256"},{"indexed":false,"internalType":"address","name":"liquidator","type":"address"},{"indexed":false,"internalType":"bool","name":"receiveAToken","type":"bool"}],"name":"LiquidationCall","type":"event"},{"anonymous":false,"inputs":[],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"}],"name":"RebalanceStableBorrowRate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"repayer","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Repay","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":false,"internalType":"uint256","name":"liquidityRate","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"stableBorrowRate","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"variableBorrowRate","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"liquidityIndex","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"variableBorrowIndex","type":"uint256"}],"name":"ReserveDataUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"}],"name":"ReserveUsedAsCollateralDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"}],"name":"ReserveUsedAsCollateralEnabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"rateMode","type":"uint256"}],"name":"Swap","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"FLASHLOAN_PREMIUM_TOTAL","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"LENDINGPOOL_REVISION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_NUMBER_RESERVES","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_STABLE_RATE_BORROW_SIZE_PERCENT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"interestRateMode","type":"uint256"},{"internalType":"uint16","name":"referralCode","type":"uint16"},{"internalType":"address","name":"onBehalfOf","type":"address"}],"name":"borrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"},{"internalType":"uint16","name":"referralCode","type":"uint16"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"balanceFromBefore","type":"uint256"},{"internalType":"uint256","name":"balanceToBefore","type":"uint256"}],"name":"finalizeTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"receiverAddress","type":"address"},{"internalType":"address[]","name":"assets","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"},{"internalType":"uint256[]","name":"modes","type":"uint256[]"},{"internalType":"address","name":"onBehalfOf","type":"address"},{"internalType":"bytes","name":"params","type":"bytes"},{"internalType":"uint16","name":"referralCode","type":"uint16"}],"name":"flashLoan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAddressesProvider","outputs":[{"internalType":"contract ILendingPoolAddressesProvider","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"getConfiguration","outputs":[{"components":[{"internalType":"uint256","name":"data","type":"uint256"}],"internalType":"struct DataTypes.ReserveConfigurationMap","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"getReserveData","outputs":[{"components":[{"components":[{"internalType":"uint256","name":"data","type":"uint256"}],"internalType":"struct DataTypes.ReserveConfigurationMap","name":"configuration","type":"tuple"},{"internalType":"uint128","name":"liquidityIndex","type":"uint128"},{"internalType":"uint128","name":"variableBorrowIndex","type":"uint128"},{"internalType":"uint128","name":"currentLiquidityRate","type":"uint128"},{"internalType":"uint128","name":"currentVariableBorrowRate","type":"uint128"},{"internalType":"uint128","name":"currentStableBorrowRate","type":"uint128"},{"internalType":"uint40","name":"lastUpdateTimestamp","type":"uint40"},{"internalType":"address","name":"aTokenAddress","type":"address"},{"internalType":"address","name":"stableDebtTokenAddress","type":"address"},{"internalType":"address","name":"variableDebtTokenAddress","type":"address"},{"internalType":"address","name":"interestRateStrategyAddress","type":"address"},{"internalType":"uint8","name":"id","type":"uint8"}],"internalType":"struct DataTypes.ReserveData","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"getReserveNormalizedIncome","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"getReserveNormalizedVariableDebt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getReservesList","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUserAccountData","outputs":[{"internalType":"uint256","name":"totalCollateralETH","type":"uint256"},{"internalType":"uint256","name":"totalDebtETH","type":"uint256"},{"internalType":"uint256","name":"availableBorrowsETH","type":"uint256"},{"internalType":"uint256","name":"currentLiquidationThreshold","type":"uint256"},{"internalType":"uint256","name":"ltv","type":"uint256"},{"internalType":"uint256","name":"healthFactor","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUserConfiguration","outputs":[{"components":[{"internalType":"uint256","name":"data","type":"uint256"}],"internalType":"struct DataTypes.UserConfigurationMap","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"address","name":"aTokenAddress","type":"address"},{"internalType":"address","name":"stableDebtAddress","type":"address"},{"internalType":"address","name":"variableDebtAddress","type":"address"},{"internalType":"address","name":"interestRateStrategyAddress","type":"address"}],"name":"initReserve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ILendingPoolAddressesProvider","name":"provider","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"collateralAsset","type":"address"},{"internalType":"address","name":"debtAsset","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"debtToCover","type":"uint256"},{"internalType":"bool","name":"receiveAToken","type":"bool"}],"name":"liquidationCall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"address","name":"user","type":"address"}],"name":"rebalanceStableBorrowRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"rateMode","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"}],"name":"repay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"configuration","type":"uint256"}],"name":"setConfiguration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"val","type":"bool"}],"name":"setPause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"address","name":"rateStrategyAddress","type":"address"}],"name":"setReserveInterestRateStrategyAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"bool","name":"useAsCollateral","type":"bool"}],"name":"setUserUseReserveAsCollateral","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"rateMode","type":"uint256"}],"name":"swapBorrowRateMode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Multichain Portfolio | 34 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.